diff --git a/packages/backend/src/misc/id/aid.ts b/packages/backend/src/misc/id/aid.ts
index b69cc0c4f..93a9929aa 100644
--- a/packages/backend/src/misc/id/aid.ts
+++ b/packages/backend/src/misc/id/aid.ts
@@ -6,7 +6,7 @@ import * as crypto from 'node:crypto';
 const TIME2000 = 946684800000;
 let counter = crypto.randomBytes(2).readUInt16LE(0);
 
-export function getTimeId(time: number): string {
+function getTime(time: number): string {
 	time = time - TIME2000;
 	if (time < 0) time = 0;
 
@@ -21,7 +21,7 @@ export function genAid(date: Date): string {
 	const t = date.getTime();
 	if (isNaN(t)) throw 'Failed to create AID: Invalid Date';
 	counter++;
-	return getTimeId(t) + getNoise();
+	return getTime(t) + getNoise();
 }
 
 export function parseAid(id: string): { date: Date; } {
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index 7eea1d850..dc894ea46 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -65,7 +65,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				.where('following.followerId = :followerId', { followerId: me.id })
 				.getMany();
 
-			const minId = getTimeId(new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)).getTime()) + '00'; // 30日前まで
 			//#region Construct query
 			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
 				ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)