diff --git a/app/game-engine/src/turn/calendarHandlers.ts b/app/game-engine/src/turn/calendarHandlers.ts
index f8a532a..20b7f22 100644
--- a/app/game-engine/src/turn/calendarHandlers.ts
+++ b/app/game-engine/src/turn/calendarHandlers.ts
@@ -8,6 +8,11 @@ export const composeCalendarHandlers = (
         return undefined;
     }
     return {
+        beforeMonthChanged: (context) => {
+            for (const handler of resolved) {
+                handler.beforeMonthChanged?.(context);
+            }
+        },
         onMonthChanged: (context) => {
             for (const handler of resolved) {
                 handler.onMonthChanged?.(context);
diff --git a/app/game-engine/src/turn/databaseHooks.ts b/app/game-engine/src/turn/databaseHooks.ts
index bba692c..4df57bb 100644
--- a/app/game-engine/src/turn/databaseHooks.ts
+++ b/app/game-engine/src/turn/databaseHooks.ts
@@ -336,6 +336,7 @@ export const createDatabaseTurnHooks = async (
             createdNations,
             createdTroops,
             createdDiplomacy,
+            deletedEvents,
         } = changes;
         const reservedTurnChanges = options?.reservedTurns?.peekDirtyState();
 
@@ -487,6 +488,11 @@ export const createDatabaseTurnHooks = async (
                     where: { id: { in: deletedNations } },
                 });
             }
+            if (deletedEvents.length > 0) {
+                await prisma.event.deleteMany({
+                    where: { id: { in: deletedEvents } },
+                });
+            }
 
             await Promise.all([
                 ...generals
diff --git a/app/game-engine/src/turn/inMemoryWorld.ts b/app/game-engine/src/turn/inMemoryWorld.ts
index bdf02a3..d23d144 100644
--- a/app/game-engine/src/turn/inMemoryWorld.ts
+++ b/app/game-engine/src/turn/inMemoryWorld.ts
@@ -2,7 +2,7 @@ import type { City, LogEntryDraft, MessageDraft, Nation, ScenarioConfig, Troop,
 import { getNextTurnAt } from '@sammo-ts/logic';
 
 import type { TurnCheckpoint } from '../lifecycle/types.js';
-import type { TurnDiplomacy, TurnGeneral, TurnWorldSnapshot, TurnWorldState } from './types.js';
+import type { TurnDiplomacy, TurnEvent, TurnGeneral, TurnWorldSnapshot, TurnWorldState } from './types.js';
 import {
     applyDiplomacyPatch as applyDiplomacyPatchToEntry,
     buildDefaultDiplomacy,
@@ -58,7 +58,8 @@ export interface TurnCalendarContext {
 }
 
 export interface TurnCalendarHandler {
-    // 월/연 변경에 따른 후처리를 끼워 넣기 위한 확장 포인트.
+    // 레거시 PRE_MONTH는 날짜 변경 전, MONTH는 날짜 변경 후에 실행된다.
+    beforeMonthChanged?(context: TurnCalendarContext): void;
     onMonthChanged?(context: TurnCalendarContext): void;
     onYearChanged?(context: TurnCalendarContext): void;
 }
@@ -85,6 +86,7 @@ export interface TurnWorldChanges {
     createdNations: Nation[];
     createdTroops: Troop[];
     createdDiplomacy: TurnDiplomacy[];
+    deletedEvents: number[];
 }
 
 const compareTurnOrder = (left: TurnGeneral, right: TurnGeneral): number => {
@@ -231,6 +233,7 @@ export class InMemoryTurnWorld {
     private readonly nations = new Map<number, Nation>();
     private readonly troops = new Map<number, Troop>();
     private readonly diplomacy = new Map<string, TurnDiplomacy>();
+    private readonly events = new Map<number, TurnEvent>();
     private readonly dirtyGeneralIds = new Set<number>();
     private readonly dirtyCityIds = new Set<number>();
     private readonly dirtyNationIds = new Set<number>();
@@ -243,6 +246,7 @@ export class InMemoryTurnWorld {
     private readonly deletedTroopIds = new Set<number>();
     private readonly deletedGeneralIds = new Set<number>();
     private readonly deletedNationIds = new Set<number>();
+    private readonly deletedEventIds = new Set<number>();
     private readonly deletedNationSnapshots: Array<{
         nation: Nation;
         generalIds: number[];
@@ -287,6 +291,9 @@ export class InMemoryTurnWorld {
                 meta: { ...entry.meta },
             });
         }
+        for (const event of snapshot.events) {
+            this.events.set(event.id, { ...event, meta: { ...event.meta } });
+        }
         this.ensureDiplomacyMatrix();
     }
 
@@ -350,6 +357,21 @@ export class InMemoryTurnWorld {
         }));
     }
 
+    listEvents(targetCode?: string): TurnEvent[] {
+        return Array.from(this.events.values())
+            .filter((event) => targetCode === undefined || event.targetCode.toLowerCase() === targetCode.toLowerCase())
+            .sort((left, right) => right.priority - left.priority || left.id - right.id)
+            .map((event) => ({ ...event, meta: { ...event.meta } }));
+    }
+
+    removeEvent(id: number): boolean {
+        if (!this.events.delete(id)) {
+            return false;
+        }
+        this.deletedEventIds.add(id);
+        return true;
+    }
+
     getDiplomacyEntry(srcNationId: number, destNationId: number): TurnDiplomacy | null {
         if (srcNationId === destNationId) {
             return null;
@@ -691,6 +713,15 @@ export class InMemoryTurnWorld {
             nextYear = previousYear + 1;
         }
 
+        const context: TurnCalendarContext = {
+            previousYear,
+            previousMonth,
+            currentYear: nextYear,
+            currentMonth: nextMonth,
+            turnTime,
+        };
+        this.calendarHandler?.beforeMonthChanged?.(context);
+
         const meta = {
             ...this.state.meta,
             lastTurnTime: turnTime.toISOString(),
@@ -703,13 +734,6 @@ export class InMemoryTurnWorld {
             meta,
         };
 
-        const context: TurnCalendarContext = {
-            previousYear,
-            previousMonth,
-            currentYear: nextYear,
-            currentMonth: nextMonth,
-            turnTime,
-        };
         this.advanceDiplomacyMonth();
         this.calendarHandler?.onMonthChanged?.(context);
         if (nextYear !== previousYear) {
@@ -748,6 +772,7 @@ export class InMemoryTurnWorld {
         const deletedTroops = Array.from(this.deletedTroopIds);
         const deletedGenerals = Array.from(this.deletedGeneralIds);
         const deletedNations = Array.from(this.deletedNationIds);
+        const deletedEvents = Array.from(this.deletedEventIds);
         const deletedNationSnapshots = this.deletedNationSnapshots.slice();
         const logs = this.logs.slice();
         const messages = this.messages.slice();
@@ -768,6 +793,7 @@ export class InMemoryTurnWorld {
             createdNations,
             createdTroops,
             createdDiplomacy,
+            deletedEvents,
         };
     }
 
@@ -788,6 +814,7 @@ export class InMemoryTurnWorld {
         for (const id of changes.deletedTroops) this.deletedTroopIds.delete(id);
         for (const id of changes.deletedGenerals) this.deletedGeneralIds.delete(id);
         for (const id of changes.deletedNations) this.deletedNationIds.delete(id);
+        for (const id of changes.deletedEvents) this.deletedEventIds.delete(id);
         this.deletedNationSnapshots.splice(0, changes.deletedNationSnapshots.length);
         this.logs.splice(0, changes.logs.length);
         this.messages.splice(0, changes.messages.length);
diff --git a/app/game-engine/src/turn/monthlyEventHandler.ts b/app/game-engine/src/turn/monthlyEventHandler.ts
new file mode 100644
index 0000000..076550f
--- /dev/null
+++ b/app/game-engine/src/turn/monthlyEventHandler.ts
@@ -0,0 +1,174 @@
+import type { InMemoryTurnWorld, TurnCalendarContext, TurnCalendarHandler } from './inMemoryWorld.js';
+import type { TurnEvent } from './types.js';
+
+export interface MonthlyEventEnvironment {
+    year: number;
+    month: number;
+    startyear: number;
+    currentEventID: number;
+    turnTime: Date;
+}
+
+export type MonthlyEventActionHandler = (
+    args: readonly unknown[],
+    environment: MonthlyEventEnvironment,
+    event: TurnEvent
+) => void;
+
+export type MonthlyEventActionRegistry = ReadonlyMap<string, MonthlyEventActionHandler>;
+
+const COMPARATORS = new Set(['==', '!=', '<', '>', '<=', '>=']);
+
+const compare = (left: readonly (number | null)[], operator: string, right: readonly (number | null)[]): boolean => {
+    const normalize = (values: readonly (number | null)[]): string =>
+        values.map((value) => (value === null ? '' : String(value).padStart(12, '0'))).join(':');
+    const lhs = normalize(left);
+    const rhs = normalize(right);
+    switch (operator) {
+        case '==':
+            return lhs === rhs;
+        case '!=':
+            return lhs !== rhs;
+        case '<':
+            return lhs < rhs;
+        case '>':
+            return lhs > rhs;
+        case '<=':
+            return lhs <= rhs;
+        case '>=':
+            return lhs >= rhs;
+        default:
+            return false;
+    }
+};
+
+const readNullableInteger = (value: unknown, label: string): number | null => {
+    if (value === null) {
+        return null;
+    }
+    if (typeof value !== 'number' || !Number.isInteger(value)) {
+        throw new Error(`${label} must be an integer or null.`);
+    }
+    return value;
+};
+
+const evaluateCondition = (
+    raw: unknown,
+    environment: MonthlyEventEnvironment,
+    remainingNationCount: number
+): boolean => {
+    if (typeof raw === 'boolean') {
+        return raw;
+    }
+    if (!Array.isArray(raw) || typeof raw[0] !== 'string') {
+        throw new Error('Event condition must be a boolean or condition tuple.');
+    }
+
+    const name = raw[0];
+    const normalized = name.toLowerCase();
+    if (normalized === 'not') {
+        if (raw.length !== 2) {
+            throw new Error('not condition requires exactly one operand.');
+        }
+        return !evaluateCondition(raw[1], environment, remainingNationCount);
+    }
+    if (normalized === 'and') {
+        return raw.slice(1).every((condition) => evaluateCondition(condition, environment, remainingNationCount));
+    }
+    if (normalized === 'or') {
+        return raw.slice(1).some((condition) => evaluateCondition(condition, environment, remainingNationCount));
+    }
+    if (normalized === 'xor') {
+        return raw
+            .slice(1)
+            .reduce(
+                (value, condition) => value !== evaluateCondition(condition, environment, remainingNationCount),
+                false
+            );
+    }
+
+    if (name === 'Date' || name === 'DateRelative') {
+        const operator = raw[1];
+        if (typeof operator !== 'string' || !COMPARATORS.has(operator)) {
+            throw new Error(`${name} condition has an invalid comparator.`);
+        }
+        const year = readNullableInteger(raw[2], `${name}.year`);
+        const month = readNullableInteger(raw[3], `${name}.month`);
+        if (year === null && month === null) {
+            throw new Error(`${name} condition requires year or month.`);
+        }
+        const currentYear = name === 'DateRelative' ? environment.year - environment.startyear : environment.year;
+        return compare([year === null ? null : currentYear, month === null ? null : environment.month], operator, [
+            year,
+            month,
+        ]);
+    }
+
+    if (name === 'RemainNation') {
+        const operator = raw[1];
+        const count = raw[2];
+        if (typeof operator !== 'string' || !COMPARATORS.has(operator) || typeof count !== 'number') {
+            throw new Error('RemainNation condition is invalid.');
+        }
+        return compare([remainingNationCount], operator, [Math.floor(count)]);
+    }
+
+    throw new Error(`Unsupported event condition: ${name}`);
+};
+
+const parseActions = (raw: unknown): Array<{ name: string; args: readonly unknown[] }> => {
+    if (!Array.isArray(raw)) {
+        throw new Error('Event action list must be an array.');
+    }
+    return raw.map((action) => {
+        if (!Array.isArray(action) || typeof action[0] !== 'string') {
+            throw new Error('Event action must be a tuple beginning with its name.');
+        }
+        return { name: action[0], args: action.slice(1) };
+    });
+};
+
+export const createMonthlyEventHandler = (options: {
+    getWorld: () => InMemoryTurnWorld | null;
+    startYear: number;
+    actions?: MonthlyEventActionRegistry;
+}): TurnCalendarHandler => {
+    const dispatch = (targetCode: 'pre_month' | 'month', context: TurnCalendarContext): void => {
+        const world = options.getWorld();
+        if (!world) {
+            return;
+        }
+        const year = targetCode === 'pre_month' ? context.previousYear : context.currentYear;
+        const month = targetCode === 'pre_month' ? context.previousMonth : context.currentMonth;
+        const remainingNationCount = world.listNations().filter((nation) => nation.id > 0).length;
+
+        for (const event of world.listEvents(targetCode)) {
+            const environment: MonthlyEventEnvironment = {
+                year,
+                month,
+                startyear: options.startYear,
+                currentEventID: event.id,
+                turnTime: context.turnTime,
+            };
+            if (!evaluateCondition(event.condition, environment, remainingNationCount)) {
+                continue;
+            }
+            for (const action of parseActions(event.action)) {
+                if (action.name === 'DeleteEvent') {
+                    world.removeEvent(event.id);
+                    continue;
+                }
+                const handler = options.actions?.get(action.name);
+                if (!handler) {
+                    throw new Error(`Unsupported monthly event action: ${action.name} (eventId=${event.id})`);
+                }
+                handler(action.args, environment, event);
+            }
+        }
+    };
+
+    return {
+        beforeMonthChanged: (context) => dispatch('pre_month', context),
+        onMonthChanged: (context) => dispatch('month', context),
+    };
+};
diff --git a/app/game-engine/src/turn/turnDaemon.ts b/app/game-engine/src/turn/turnDaemon.ts
index 0b0a9c3..5b6cfeb 100644
--- a/app/game-engine/src/turn/turnDaemon.ts
+++ b/app/game-engine/src/turn/turnDaemon.ts
@@ -1,4 +1,4 @@
-import type { TurnCommandProfile, TurnSchedule } from '@sammo-ts/logic';
+import { LogCategory, LogScope, type TurnCommandProfile, type TurnSchedule } from '@sammo-ts/logic';
 import { buildGameEventChannel, type RealtimeEvent } from '@sammo-ts/common';
 import { createGamePostgresConnector, createRedisConnector, resolveRedisConfigFromEnv } from '@sammo-ts/infra';
 import { NATION_TRAIT_KEYS, NationTraitLoader, loadNationTraitModules } from '@sammo-ts/logic';
@@ -33,6 +33,7 @@ import { createAuctionBidder } from '../auction/bidder.js';
 import { createTournamentRewardFinalizer } from '../tournament/finalizer.js';
 import { createTournamentAutoStartHandler } from './tournamentAutoStart.js';
 import { createYearbookHandler } from './yearbookHandler.js';
+import { createMonthlyEventHandler, type MonthlyEventActionHandler } from './monthlyEventHandler.js';
 
 export interface TurnDaemonRuntimeOptions {
     profile: string;
@@ -125,6 +126,71 @@ export const createTurnDaemonRuntime = async (options: TurnDaemonRuntimeOptions)
         scenarioConfig: snapshot.scenarioConfig,
         nationTraits: nationTraitMap,
     });
+    const hasEventAction = (name: string): boolean =>
+        snapshot.events.some(
+            (event) =>
+                Array.isArray(event.action) &&
+                event.action.some((action) => Array.isArray(action) && action[0] === name)
+        );
+    const eventActions = new Map<string, MonthlyEventActionHandler>();
+    eventActions.set('ProcessIncome', (_args, environment) => {
+        incomeHandler.onMonthChanged?.({
+            previousYear: environment.month === 1 ? environment.year - 1 : environment.year,
+            previousMonth: environment.month === 1 ? 12 : environment.month - 1,
+            currentYear: environment.year,
+            currentMonth: environment.month,
+            turnTime: environment.turnTime,
+        });
+    });
+    eventActions.set('NoticeToHistoryLog', (args) => {
+        const text = args[0];
+        if (typeof text !== 'string' || !worldRef) {
+            return;
+        }
+        worldRef.pushLog({
+            scope: LogScope.SYSTEM,
+            category: LogCategory.HISTORY,
+            text,
+        });
+    });
+    eventActions.set('NewYear', (_args, environment) => {
+        if (!worldRef) {
+            return;
+        }
+        for (const general of worldRef.listGenerals()) {
+            const belong = general.meta.belong;
+            worldRef.updateGeneral(general.id, {
+                age: general.age + 1,
+                meta: {
+                    ...general.meta,
+                    ...(general.nationId !== 0
+                        ? { belong: typeof belong === 'number' && Number.isFinite(belong) ? belong + 1 : 1 }
+                        : {}),
+                },
+            });
+        }
+        worldRef.pushLog({
+            scope: LogScope.SYSTEM,
+            category: LogCategory.ACTION,
+            text: `<C>${environment.year}</>년이 되었습니다.`,
+        });
+    });
+    eventActions.set('ResetOfficerLock', () => {
+        if (!worldRef) {
+            return;
+        }
+        for (const nation of worldRef.listNations()) {
+            worldRef.updateNation(nation.id, { meta: { ...nation.meta, chief_set: 0 } });
+        }
+        for (const city of worldRef.listCities()) {
+            worldRef.updateCity(city.id, { meta: { ...city.meta, officer_set: 0 } });
+        }
+    });
+    const monthlyEventHandler = createMonthlyEventHandler({
+        getWorld: () => worldRef,
+        startYear: snapshot.scenarioMeta?.startYear ?? state.currentYear,
+        actions: eventActions,
+    });
     const nationTurnMonthlyHandler = createNationTurnMonthlyHandler({
         getWorld: () => worldRef,
     });
@@ -144,9 +210,10 @@ export const createTurnDaemonRuntime = async (options: TurnDaemonRuntimeOptions)
         getWorld: () => worldRef,
     });
     const calendarHandler = composeCalendarHandlers(
+        monthlyEventHandler,
         options.calendarHandler ?? unification?.handler,
         nationTurnMonthlyHandler,
-        incomeHandler,
+        hasEventAction('ProcessIncome') ? null : incomeHandler,
         frontStateHandler,
         tournamentAutoStartHandler,
         yearbookHandler.handler
diff --git a/app/game-engine/src/turn/types.ts b/app/game-engine/src/turn/types.ts
index 499e80f..eaf8130 100644
--- a/app/game-engine/src/turn/types.ts
+++ b/app/game-engine/src/turn/types.ts
@@ -33,6 +33,15 @@ export interface TurnDiplomacy {
     meta: Record<string, unknown>;
 }
 
+export interface TurnEvent {
+    id: number;
+    targetCode: string;
+    priority: number;
+    condition: unknown;
+    action: unknown;
+    meta: Record<string, unknown>;
+}
+
 export interface TurnWorldSnapshot extends Omit<
     WorldSnapshot,
     'generals' | 'cities' | 'nations' | 'troops' | 'diplomacy'
@@ -43,8 +52,8 @@ export interface TurnWorldSnapshot extends Omit<
     map: MapDefinition;
     unitSet?: UnitSetDefinition;
     diplomacy: TurnDiplomacy[];
-    events: unknown[];
-    initialEvents: unknown[];
+    events: TurnEvent[];
+    initialEvents: TurnEvent[];
     generals: TurnGeneral[];
     cities: City[];
     nations: Nation[];
diff --git a/app/game-engine/src/turn/worldLoader.ts b/app/game-engine/src/turn/worldLoader.ts
index 5fa9177..5b7ae28 100644
--- a/app/game-engine/src/turn/worldLoader.ts
+++ b/app/game-engine/src/turn/worldLoader.ts
@@ -26,7 +26,7 @@ import type { MapLoaderOptions } from '../scenario/mapLoader.js';
 import { loadMapDefinitionByName } from '../scenario/mapLoader.js';
 import type { UnitSetLoaderOptions } from '../scenario/unitSetLoader.js';
 import { loadUnitSetDefinitionByName } from '../scenario/unitSetLoader.js';
-import type { TurnDiplomacy, TurnGeneral, TurnWorldLoadResult } from './types.js';
+import type { TurnDiplomacy, TurnEvent, TurnGeneral, TurnWorldLoadResult } from './types.js';
 import { readDiplomacyMeta } from '@sammo-ts/logic';
 
 interface TurnWorldLoaderOptions {
@@ -262,6 +262,22 @@ const mapDiplomacyRow = (row: TurnEngineDiplomacyRow): TurnDiplomacy => {
     };
 };
 
+const mapEventRow = (row: {
+    id: number;
+    targetCode: string;
+    priority: number;
+    condition: JsonValue;
+    action: JsonValue;
+    meta: JsonValue;
+}): TurnEvent => ({
+    id: row.id,
+    targetCode: row.targetCode,
+    priority: row.priority,
+    condition: row.condition,
+    action: row.action,
+    meta: asRecord(row.meta),
+});
+
 const mapTroopRow = (row: TurnEngineTroopRow): Troop => ({
     id: row.troopLeaderId,
     nationId: row.nationId,
@@ -309,26 +325,8 @@ export const loadTurnWorldFromDatabase = async (options: TurnWorldLoaderOptions)
         const fallbackBase = resolveFallbackTurnTimeBase(generals, worldState.updatedAt ?? null);
         const lastTurnTime = parseLastTurnTime(meta) ?? alignToPreviousTick(fallbackBase, tickMinutes);
 
-        const events = eventRows
-            .filter((row) => row.targetCode !== 'initial')
-            .map((row) => ({
-                id: row.id,
-                targetCode: row.targetCode,
-                priority: row.priority,
-                condition: row.condition,
-                action: row.action,
-                meta: row.meta,
-            }));
-        const initialEvents = eventRows
-            .filter((row) => row.targetCode === 'initial')
-            .map((row) => ({
-                id: row.id,
-                targetCode: row.targetCode,
-                priority: row.priority,
-                condition: row.condition,
-                action: row.action,
-                meta: row.meta,
-            }));
+        const events = eventRows.filter((row) => row.targetCode !== 'initial').map(mapEventRow);
+        const initialEvents = eventRows.filter((row) => row.targetCode === 'initial').map(mapEventRow);
 
         return {
             state: {
diff --git a/app/game-engine/test/monthlyEventHandler.test.ts b/app/game-engine/test/monthlyEventHandler.test.ts
new file mode 100644
index 0000000..c4c72a7
--- /dev/null
+++ b/app/game-engine/test/monthlyEventHandler.test.ts
@@ -0,0 +1,153 @@
+import { describe, expect, it } from 'vitest';
+import type { MapDefinition } from '@sammo-ts/logic';
+
+import { InMemoryTurnWorld } from '../src/turn/inMemoryWorld.js';
+import { createMonthlyEventHandler, type MonthlyEventActionHandler } from '../src/turn/monthlyEventHandler.js';
+import type { TurnWorldSnapshot, TurnWorldState } from '../src/turn/types.js';
+
+const map: MapDefinition = {
+    id: 'event-test',
+    name: 'event-test',
+    cities: [],
+    defaults: { trust: 50, trade: 100, supplyState: 1, frontState: 0 },
+};
+
+const buildWorld = (
+    events: TurnWorldSnapshot['events'],
+    actions: Map<string, MonthlyEventActionHandler>
+): InMemoryTurnWorld => {
+    const state: TurnWorldState = {
+        id: 1,
+        currentYear: 189,
+        currentMonth: 12,
+        tickSeconds: 600,
+        lastTurnTime: new Date('0189-12-01T00:00:00.000Z'),
+        meta: {},
+    };
+    const snapshot: TurnWorldSnapshot = {
+        scenarioConfig: {
+            stat: { total: 300, min: 10, max: 100, npcTotal: 150, npcMax: 50, npcMin: 10, chiefMin: 70 },
+            iconPath: '',
+            map: {},
+            const: {},
+            environment: { mapName: map.id, unitSet: 'default' },
+        },
+        scenarioMeta: {
+            title: 'event test',
+            startYear: 189,
+            life: null,
+            fiction: null,
+            history: [],
+            ignoreDefaultEvents: false,
+        },
+        map,
+        diplomacy: [],
+        events,
+        initialEvents: [],
+        generals: [],
+        cities: [],
+        nations: [],
+        troops: [],
+    };
+    let world: InMemoryTurnWorld | null = null;
+    const handler = createMonthlyEventHandler({
+        getWorld: () => world,
+        startYear: 189,
+        actions,
+    });
+    world = new InMemoryTurnWorld(state, snapshot, {
+        schedule: { entries: [{ startMinute: 0, tickMinutes: 10 }] },
+        calendarHandler: handler,
+    });
+    return world;
+};
+
+describe('monthly event pipeline', () => {
+    it('runs PRE_MONTH before the date change and MONTH after it in priority/id order', () => {
+        const trace: string[] = [];
+        const actions = new Map<string, MonthlyEventActionHandler>([
+            [
+                'Trace',
+                (args, environment) => {
+                    trace.push(`${String(args[0])}:${environment.year}-${environment.month}`);
+                },
+            ],
+        ]);
+        const world = buildWorld(
+            [
+                {
+                    id: 2,
+                    targetCode: 'month',
+                    priority: 10,
+                    condition: true,
+                    action: [['Trace', 'month-low']],
+                    meta: {},
+                },
+                {
+                    id: 3,
+                    targetCode: 'month',
+                    priority: 20,
+                    condition: ['DateRelative', '==', 1, 1],
+                    action: [['Trace', 'month-high']],
+                    meta: {},
+                },
+                {
+                    id: 1,
+                    targetCode: 'pre_month',
+                    priority: 0,
+                    condition: ['Date', '==', 189, 12],
+                    action: [['Trace', 'pre']],
+                    meta: {},
+                },
+            ],
+            actions
+        );
+
+        world.advanceMonth(new Date('0190-01-01T00:00:00.000Z'));
+
+        expect(trace).toEqual(['pre:189-12', 'month-high:190-1', 'month-low:190-1']);
+    });
+
+    it('supports logic conditions and persists DeleteEvent through dirty state', () => {
+        const world = buildWorld(
+            [
+                {
+                    id: 7,
+                    targetCode: 'month',
+                    priority: 0,
+                    condition: ['and', ['Date', '==', null, 1], ['RemainNation', '==', 0]],
+                    action: [['DeleteEvent']],
+                    meta: {},
+                },
+            ],
+            new Map()
+        );
+
+        world.advanceMonth(new Date('0190-01-01T00:00:00.000Z'));
+
+        expect(world.listEvents('month')).toEqual([]);
+        expect(world.peekDirtyState().deletedEvents).toEqual([7]);
+        world.acknowledgeDirtyState(world.peekDirtyState());
+        expect(world.peekDirtyState().deletedEvents).toEqual([]);
+    });
+
+    it('fails explicitly when a scenario action has not been migrated', () => {
+        const world = buildWorld(
+            [
+                {
+                    id: 9,
+                    targetCode: 'month',
+                    priority: 0,
+                    condition: true,
+                    action: [['RaiseInvader']],
+                    meta: {},
+                },
+            ],
+            new Map()
+        );
+
+        expect(() => world.advanceMonth(new Date('0190-01-01T00:00:00.000Z'))).toThrow(
+            'Unsupported monthly event action: RaiseInvader (eventId=9)'
+        );
+    });
+});
diff --git a/docs/architecture/legacy-engine-events.md b/docs/architecture/legacy-engine-events.md
index 50e3ac6..176fbb0 100644
--- a/docs/architecture/legacy-engine-events.md
+++ b/docs/architecture/legacy-engine-events.md
@@ -40,6 +40,22 @@ Indexes: `(target, priority, id)` for dispatch ordering. Both `condition` and
 Events are used inside the monthly pipeline and in special moments like
 city occupation (`EventTarget::OCCUPY_CITY`, called by some commands).
 
+### Rewrite runtime status
+
+`app/game-engine/src/turn/monthlyEventHandler.ts` now dispatches persisted
+`event` rows for `pre_month` and `month`. It preserves the legacy
+`priority DESC, id ASC` order, evaluates `Date`, `DateRelative`, `RemainNation`,
+and the boolean logic operators, and records `DeleteEvent` through the normal
+turn dirty-state transaction.
+
+The calendar calls `pre_month` before changing the world date and `month`
+after changing it. Action names are resolved through an explicit registry.
+An unported action stops the turn with its action name and event id instead of
+being silently ignored. The runtime registry currently covers
+`ProcessIncome`, `NoticeToHistoryLog`, `NewYear`, and `ResetOfficerLock`;
+the remaining legacy action catalog must be migrated before full event-action
+parity can be claimed.
+
 ## Condition and Action DSL
 
 `Event\Condition::build()` and `Event\Action::build()` decode JSON arrays into
diff --git a/docs/architecture/todo.md b/docs/architecture/todo.md
index f3864b0..8feb8ee 100644
--- a/docs/architecture/todo.md
+++ b/docs/architecture/todo.md
@@ -23,7 +23,11 @@ Move items into the main docs once they are finalized.
 - [AI suggestion] Implement command continuation/alternate flow (LastTurn/term stack/pre/post requirements/next_execute) and integrate into reserved turn processing.
 - [AI suggestion] Integrate trigger preprocessing + attempt/execute phases into turn resolution (parity with legacy trigger composition).
 - [AI suggestion] Add AI/autorun and inactivity (killturn/block) handling with NPC takeover/deletion policies.
-- [AI suggestion] Add an event execution pipeline (initial + monthly + conditional) tied to tick/month transitions with deterministic RNG seeding.
+- [AI suggestion] Complete the event action registry beyond the implemented
+  `pre_month`/`month` dispatcher (`ProcessIncome`, `NoticeToHistoryLog`,
+  `NewYear`, `ResetOfficerLock`). Add initial and non-month targets plus the
+  remaining NPC, invader, disaster, supply, nation-level, betting, and
+  inheritance actions with legacy-compatible deterministic RNG.
 - [AI suggestion] Add monthly economy/city/nation updates and hook them into the turn calendar handler.
 - [AI suggestion] Implement diplomacy/state transitions and monthly/command-based updates beyond read-only maps.
 - [AI suggestion] Integrate war/battle pipeline into turn processing (troop movement/war resolution hooks, not just isolated sim jobs).