diff --git a/app/game-engine/src/turn/inMemoryWorld.ts b/app/game-engine/src/turn/inMemoryWorld.ts
index 1f201f11..bb605ce9 100644
--- a/app/game-engine/src/turn/inMemoryWorld.ts
+++ b/app/game-engine/src/turn/inMemoryWorld.ts
@@ -656,6 +656,16 @@ export class InMemoryTurnWorld {
         return this.getGameClock().now(wallNow);
     }
 
+    getRunnableGameNow(wallNow: Date): Date {
+        const clock = this.getGameClock();
+        // PREOPEN still needs negative game ticks for cooldowns, but executable
+        // turn schedules must not precede the wall-clock opening boundary.
+        if (clock.mode === 'realtime' && wallNow.getTime() < clock.wallAnchor.getTime()) {
+            return clock.now(clock.wallAnchor);
+        }
+        return clock.now(wallNow);
+    }
+
     dateToGameTick(date: Date): number {
         return this.getGameClock().dateToTick(date);
     }
diff --git a/app/game-engine/src/turn/joinCreateGeneralService.ts b/app/game-engine/src/turn/joinCreateGeneralService.ts
index 16fa7d6e..f01fa873 100644
--- a/app/game-engine/src/turn/joinCreateGeneralService.ts
+++ b/app/game-engine/src/turn/joinCreateGeneralService.ts
@@ -383,7 +383,9 @@ export const resolveJoinTurnTime = (
     }
     let turnTime = new Date(turnTimeBase.getTime() + offsetSeconds * 1000 + offsetMicros / 1000);
     if (turnTime.getTime() <= acceptedAt.getTime()) {
-        turnTime = new Date(turnTime.getTime() + tickSeconds * 1000);
+        const termMs = tickSeconds * 1000;
+        const missedTerms = Math.floor((acceptedAt.getTime() - turnTime.getTime()) / termMs) + 1;
+        turnTime = new Date(turnTime.getTime() + missedTerms * termMs);
     }
     return turnTime;
 };
@@ -523,9 +525,11 @@ export const createGeneralFromJoin = async (options: {
     worldState: WorldStateRow;
     input: JoinCreateGeneralInput;
     acceptedAt: Date;
+    turnScheduleAt?: Date;
     operationalAcceptedAt: Date;
 }): Promise<{ ok: true; generalId: number }> => {
     const { db, world, worldState, input, acceptedAt, operationalAcceptedAt } = options;
+    const turnScheduleAt = options.turnScheduleAt ?? acceptedAt;
     await lockJoinMutation(db, input.userId);
     await assertGeneralIdSnapshotMatches(db, world);
 
@@ -707,7 +711,7 @@ export const createGeneralFromJoin = async (options: {
     const turnTime = resolveJoinTurnTime(
         rng,
         worldState,
-        acceptedAt,
+        turnScheduleAt,
         world.getState().lastTurnTime,
         input.inheritTurntimeZone
     );
diff --git a/app/game-engine/src/turn/selectPoolService.ts b/app/game-engine/src/turn/selectPoolService.ts
index 10f832d1..7ad581db 100644
--- a/app/game-engine/src/turn/selectPoolService.ts
+++ b/app/game-engine/src/turn/selectPoolService.ts
@@ -651,11 +651,18 @@ const resolveTurnTimeBase = (worldState: WorldStateRow, now: Date): Date => {
     return now;
 };
 
-const buildInitialTurnTime = (rng: RandUtil, worldState: WorldStateRow, now: Date): Date => {
+export const buildInitialTurnTime = (
+    rng: Pick<RandUtil, 'nextRangeInt'>,
+    worldState: WorldStateRow,
+    now: Date,
+    notBefore: Date = now
+): Date => {
     const termSeconds = resolveTurnTermMinutes(worldState) * 60;
     const seconds = rng.nextRangeInt(0, termSeconds - 1);
     const microseconds = rng.nextRangeInt(0, 999_999);
-    return new Date(resolveTurnTimeBase(worldState, now).getTime() + seconds * 1000 + microseconds / 1000);
+    const base = resolveTurnTimeBase(worldState, now);
+    const safeBase = base.getTime() < notBefore.getTime() ? notBefore : base;
+    return new Date(safeBase.getTime() + seconds * 1000 + microseconds / 1000);
 };
 
 const appendSelectionLogs = async (options: {
@@ -702,6 +709,7 @@ export const createGeneralFromSelectionPool = async (options: {
     uniqueName: string;
     personality: string;
     now?: Date;
+    turnScheduleAt?: Date;
     operationalAcceptedAt: Date;
     seedOwnerIdentity?: string | number;
     ownerPicture?: string;
@@ -761,7 +769,7 @@ export const createGeneralFromSelectionPool = async (options: {
         );
     }
     const city = rng.choice(cities);
-    const turnTime = buildInitialTurnTime(rng, worldState, now);
+    const turnTime = buildInitialTurnTime(rng, worldState, now, options.turnScheduleAt ?? now);
     const age = 20;
     const specialityAges = resolveSpecialityAges(worldState, age);
     const nextChangeAt = new Date(
diff --git a/app/game-engine/src/turn/worldCommandHandler.ts b/app/game-engine/src/turn/worldCommandHandler.ts
index 16ce9125..829cdef6 100644
--- a/app/game-engine/src/turn/worldCommandHandler.ts
+++ b/app/game-engine/src/turn/worldCommandHandler.ts
@@ -340,6 +340,7 @@ async function handleJoinCreateGeneral(
     }
     const operationalAcceptedAt = await resolveCommandAcceptedAt(db, command);
     const acceptedAt = ctx.world.getGameNow(operationalAcceptedAt);
+    const turnScheduleAt = ctx.world.getRunnableGameNow(operationalAcceptedAt);
     try {
         return {
             type: 'joinCreateGeneral',
@@ -377,6 +378,7 @@ async function handleJoinCreateGeneral(
                     ...(command.inheritBonusStat !== undefined ? { inheritBonusStat: command.inheritBonusStat } : {}),
                 },
                 acceptedAt,
+                turnScheduleAt,
                 operationalAcceptedAt,
             })),
         };
@@ -455,6 +457,7 @@ async function handleSelectPoolCreate(
             : command.acceptedGameAt !== undefined
               ? new Date(command.acceptedGameAt)
               : ctx.world.getGameNow(operationalAcceptedAt);
+    const turnScheduleAt = ctx.world.getRunnableGameNow(operationalAcceptedAt);
     try {
         return {
             type: 'selectPoolCreate',
@@ -471,6 +474,7 @@ async function handleSelectPoolCreate(
                 ...(command.ownerImageServer !== undefined ? { ownerImageServer: command.ownerImageServer } : {}),
                 ...(command.ownerIconRevision ? { ownerIconRevision: command.ownerIconRevision } : {}),
                 now: acceptedAt,
+                turnScheduleAt,
                 operationalAcceptedAt,
             })),
         };
diff --git a/app/game-engine/test/joinCreateGeneralService.test.ts b/app/game-engine/test/joinCreateGeneralService.test.ts
index 8729f2ad..1e6953ea 100644
--- a/app/game-engine/test/joinCreateGeneralService.test.ts
+++ b/app/game-engine/test/joinCreateGeneralService.test.ts
@@ -80,6 +80,27 @@ describe('generic join deterministic contracts', () => {
         ]);
     });
 
+    it('moves an inherited turn phase past the runnable opening boundary', () => {
+        const rng = {
+            nextRangeInt(min: number) {
+                return min;
+            },
+        };
+        const openingGameAt = new Date('2026-07-30T10:00:00.000Z');
+        const preopenCursor = new Date(openingGameAt.getTime() - 30 * 60_000);
+
+        const turnTime = resolveJoinTurnTime(
+            rng,
+            { tickSeconds: 60 } as Parameters<typeof resolveJoinTurnTime>[1],
+            openingGameAt,
+            preopenCursor,
+            0
+        );
+
+        expect(turnTime.getTime()).toBeGreaterThan(openingGameAt.getTime());
+        expect((turnTime.getTime() - preopenCursor.getTime()) % 60_000).toBe(0);
+    });
+
     it('uses the HiDCHe product name without the legacy PHP runtime label', () => {
         expect(JOIN_WELCOME_MESSAGE).toBe('삼국지 모의전투 HiDCHe의 세계에 오신 것을 환영합니다 ^o^');
         expect(JOIN_WELCOME_MESSAGE).not.toContain('PHP');
diff --git a/app/game-engine/test/runtimeClockShift.test.ts b/app/game-engine/test/runtimeClockShift.test.ts
index 660ade94..bad95498 100644
--- a/app/game-engine/test/runtimeClockShift.test.ts
+++ b/app/game-engine/test/runtimeClockShift.test.ts
@@ -174,6 +174,26 @@ describe('runtime clock shift', () => {
         expect(world.getGameClockState().wallAnchor).toEqual(resumedAt);
     });
 
+    it('keeps runnable general scheduling at the future opening anchor during PREOPEN', () => {
+        const gameBase = new Date('2026-07-30T10:00:00.000Z');
+        const openAt = new Date('2026-09-02T23:30:00.000Z');
+        const world = buildWorld({
+            clockBaseTime: gameBase,
+            clockTick: 0,
+            clockMode: 'realtime',
+            clockWallAnchor: openAt,
+            lastTurnTick: 0,
+        });
+        const preopenAt = new Date('2026-09-02T23:03:00.000Z');
+
+        expect(world.getGameNow(preopenAt).getTime()).toBeLessThan(gameBase.getTime());
+        expect(world.getRunnableGameNow(preopenAt)).toEqual(gameBase);
+        expect(world.getRunnableGameNow(openAt)).toEqual(gameBase);
+        expect(world.getRunnableGameNow(new Date(openAt.getTime() + 60_000))).toEqual(
+            new Date(gameBase.getTime() + 60_000)
+        );
+    });
+
     it.each([
         [5, 6],
         [10, 3],
diff --git a/app/game-engine/test/selectPoolReservation.test.ts b/app/game-engine/test/selectPoolReservation.test.ts
index 75cb562d..2883a82d 100644
--- a/app/game-engine/test/selectPoolReservation.test.ts
+++ b/app/game-engine/test/selectPoolReservation.test.ts
@@ -4,7 +4,11 @@ import { GAME_TICKS_PER_TURN } from '@sammo-ts/common';
 import { parseScenarioGeneralPoolCandidate } from '@sammo-ts/logic';
 
 import { InMemoryTurnWorld } from '../src/turn/inMemoryWorld.js';
-import { reserveSelectionPool, resolveSelectionPoolUserIcon } from '../src/turn/selectPoolService.js';
+import {
+    buildInitialTurnTime,
+    reserveSelectionPool,
+    resolveSelectionPoolUserIcon,
+} from '../src/turn/selectPoolService.js';
 import type { TurnGeneralPoolEntry, TurnWorldSnapshot, TurnWorldState } from '../src/turn/types.js';
 
 interface TestPoolRow {
@@ -28,6 +32,30 @@ interface PoolWhere {
 
 const acceptedAt = new Date('0200-05-01T00:00:00.000Z');
 
+describe('selection-pool initial turn scheduling', () => {
+    it('does not inherit a turntime base from before the opening boundary', () => {
+        const openingGameAt = new Date('0200-01-01T00:00:00.000Z');
+        const preopenGameAt = new Date(openingGameAt.getTime() - 30 * 60_000);
+        const rng = {
+            nextRangeInt(min: number) {
+                return min;
+            },
+        };
+
+        const turnTime = buildInitialTurnTime(
+            rng,
+            {
+                tickSeconds: 300,
+                meta: { turntime: preopenGameAt.toISOString() },
+            } as unknown as Parameters<typeof buildInitialTurnTime>[1],
+            preopenGameAt,
+            openingGameAt
+        );
+
+        expect(turnTime.getTime()).toBeGreaterThanOrEqual(openingGameAt.getTime());
+    });
+});
+
 const buildRows = (): TestPoolRow[] =>
     Array.from({ length: 29 }, (_, index) => {
         const uniqueName = `P${String(index + 1).padStart(2, '0')}`;