diff --git a/packages/backend/migration/1681429921400-Event.js b/packages/backend/migration/1681429921400-Event.js
new file mode 100644
index 0000000000..29054b99e4
--- /dev/null
+++ b/packages/backend/migration/1681429921400-Event.js
@@ -0,0 +1,95 @@
+export class Event1681429921400 {
+    name = 'Event1681429921400'
+
+    async up(queryRunner) {
+        await queryRunner.query(`DROP INDEX "public"."IDX_2cd3b2a6b4cf0b910b260afe08"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_renote_muting_createdAt"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_renote_muting_muteeId"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_renote_muting_muterId"`);
+        await queryRunner.query(`CREATE TABLE "event" ("id" character varying(32) NOT NULL, "start" TIMESTAMP WITH TIME ZONE NOT NULL, "end" TIMESTAMP WITH TIME ZONE, "title" character varying(128) NOT NULL, "metadata" jsonb NOT NULL DEFAULT '{}', CONSTRAINT "PK_30c2f3bbaf6d34a55f8ae6e4614" PRIMARY KEY ("id")); COMMENT ON COLUMN "event"."start" IS 'The start time of the event'; COMMENT ON COLUMN "event"."end" IS 'The end of the event'; COMMENT ON COLUMN "event"."title" IS 'short name of event'; COMMENT ON COLUMN "event"."metadata" IS 'metadata mapping for event with more user configurable optional information'`);
+        await queryRunner.query(`CREATE INDEX "IDX_785ee5fc1ea38a1b9b38ff88e5" ON "event" ("start") `);
+        await queryRunner.query(`ALTER TABLE "note" ADD "eventId" character varying(32)`);
+        await queryRunner.query(`ALTER TABLE "note" ADD CONSTRAINT "UQ_3af9380f266b7046cce9c992197" UNIQUE ("eventId")`);
+        await queryRunner.query(`COMMENT ON COLUMN "note"."eventId" IS 'The ID of child event'`);
+        await queryRunner.query(`COMMENT ON COLUMN "user"."isRoot" IS 'Whether the User is the root.'`);
+        await queryRunner.query(`COMMENT ON COLUMN "ad"."startsAt" IS 'The expired date of the Ad.'`);
+        await queryRunner.query(`ALTER TABLE "antenna" ALTER COLUMN "lastUsedAt" DROP DEFAULT`);
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "mascotImageUrl" DROP DEFAULT`);
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "errorImageUrl" DROP DEFAULT`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."createdAt" IS 'The created date of the Muting.'`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."muteeId" IS 'The mutee user ID.'`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."muterId" IS 'The muter user ID.'`);
+        await queryRunner.query(`ALTER TABLE "poll" DROP CONSTRAINT "FK_da851e06d0dfe2ef397d8b1bf1b"`);
+        await queryRunner.query(`ALTER TABLE "poll" DROP CONSTRAINT "UQ_da851e06d0dfe2ef397d8b1bf1b"`);
+        await queryRunner.query(`ALTER TABLE "promo_note" DROP CONSTRAINT "FK_e263909ca4fe5d57f8d4230dd5c"`);
+        await queryRunner.query(`ALTER TABLE "promo_note" DROP CONSTRAINT "UQ_e263909ca4fe5d57f8d4230dd5c"`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" DROP CONSTRAINT "FK_f4853eb41ab722fe05f81cedeb6"`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" DROP CONSTRAINT "UQ_f4853eb41ab722fe05f81cedeb6"`);
+        await queryRunner.query(`ALTER TABLE "user_profile" DROP CONSTRAINT "FK_51cb79b5555effaf7d69ba1cff9"`);
+        await queryRunner.query(`ALTER TABLE "user_profile" DROP CONSTRAINT "UQ_51cb79b5555effaf7d69ba1cff9"`);
+        await queryRunner.query(`ALTER TABLE "user_publickey" DROP CONSTRAINT "FK_10c146e4b39b443ede016f6736d"`);
+        await queryRunner.query(`ALTER TABLE "user_publickey" DROP CONSTRAINT "UQ_10c146e4b39b443ede016f6736d"`);
+        await queryRunner.query(`CREATE INDEX "IDX_3fcc2c589eaefc205e0714b99c" ON "ad" ("startsAt") `);
+        await queryRunner.query(`CREATE UNIQUE INDEX "IDX_c71faf11f0a28a5c0bb506203c" ON "channel_favorite" ("userId", "channelId") `);
+        await queryRunner.query(`CREATE INDEX "IDX_3af9380f266b7046cce9c99219" ON "note" ("eventId") `);
+        await queryRunner.query(`CREATE INDEX "IDX_f7b9d338207e40e768e4a5265a" ON "instance" ("firstRetrievedAt") `);
+        await queryRunner.query(`CREATE INDEX "IDX_d1259a2c2b7bb413ff449e8711" ON "renote_muting" ("createdAt") `);
+        await queryRunner.query(`CREATE INDEX "IDX_7eac97594bcac5ffcf2068089b" ON "renote_muting" ("muteeId") `);
+        await queryRunner.query(`CREATE INDEX "IDX_7aa72a5fe76019bfe8e5e0e8b7" ON "renote_muting" ("muterId") `);
+        await queryRunner.query(`CREATE UNIQUE INDEX "IDX_0d801c609cec4e9eb4b6b4490c" ON "renote_muting" ("muterId", "muteeId") `);
+        await queryRunner.query(`ALTER TABLE "note" ADD CONSTRAINT "FK_3af9380f266b7046cce9c992197" FOREIGN KEY ("eventId") REFERENCES "event"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "renote_muting" ADD CONSTRAINT "FK_7eac97594bcac5ffcf2068089b6" FOREIGN KEY ("muteeId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "renote_muting" ADD CONSTRAINT "FK_7aa72a5fe76019bfe8e5e0e8b7d" FOREIGN KEY ("muterId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "poll" ADD CONSTRAINT "FK_da851e06d0dfe2ef397d8b1bf1b" FOREIGN KEY ("noteId") REFERENCES "note"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "promo_note" ADD CONSTRAINT "FK_e263909ca4fe5d57f8d4230dd5c" FOREIGN KEY ("noteId") REFERENCES "note"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" ADD CONSTRAINT "FK_f4853eb41ab722fe05f81cedeb6" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "user_profile" ADD CONSTRAINT "FK_51cb79b5555effaf7d69ba1cff9" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "user_publickey" ADD CONSTRAINT "FK_10c146e4b39b443ede016f6736d" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "user_publickey" DROP CONSTRAINT "FK_10c146e4b39b443ede016f6736d"`);
+        await queryRunner.query(`ALTER TABLE "user_profile" DROP CONSTRAINT "FK_51cb79b5555effaf7d69ba1cff9"`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" DROP CONSTRAINT "FK_f4853eb41ab722fe05f81cedeb6"`);
+        await queryRunner.query(`ALTER TABLE "promo_note" DROP CONSTRAINT "FK_e263909ca4fe5d57f8d4230dd5c"`);
+        await queryRunner.query(`ALTER TABLE "poll" DROP CONSTRAINT "FK_da851e06d0dfe2ef397d8b1bf1b"`);
+        await queryRunner.query(`ALTER TABLE "renote_muting" DROP CONSTRAINT "FK_7aa72a5fe76019bfe8e5e0e8b7d"`);
+        await queryRunner.query(`ALTER TABLE "renote_muting" DROP CONSTRAINT "FK_7eac97594bcac5ffcf2068089b6"`);
+        await queryRunner.query(`ALTER TABLE "note" DROP CONSTRAINT "FK_3af9380f266b7046cce9c992197"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_0d801c609cec4e9eb4b6b4490c"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_7aa72a5fe76019bfe8e5e0e8b7"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_7eac97594bcac5ffcf2068089b"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_d1259a2c2b7bb413ff449e8711"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_f7b9d338207e40e768e4a5265a"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_3af9380f266b7046cce9c99219"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_c71faf11f0a28a5c0bb506203c"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_3fcc2c589eaefc205e0714b99c"`);
+        await queryRunner.query(`ALTER TABLE "user_publickey" ADD CONSTRAINT "UQ_10c146e4b39b443ede016f6736d" UNIQUE ("userId")`);
+        await queryRunner.query(`ALTER TABLE "user_publickey" ADD CONSTRAINT "FK_10c146e4b39b443ede016f6736d" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "user_profile" ADD CONSTRAINT "UQ_51cb79b5555effaf7d69ba1cff9" UNIQUE ("userId")`);
+        await queryRunner.query(`ALTER TABLE "user_profile" ADD CONSTRAINT "FK_51cb79b5555effaf7d69ba1cff9" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" ADD CONSTRAINT "UQ_f4853eb41ab722fe05f81cedeb6" UNIQUE ("userId")`);
+        await queryRunner.query(`ALTER TABLE "user_keypair" ADD CONSTRAINT "FK_f4853eb41ab722fe05f81cedeb6" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "promo_note" ADD CONSTRAINT "UQ_e263909ca4fe5d57f8d4230dd5c" UNIQUE ("noteId")`);
+        await queryRunner.query(`ALTER TABLE "promo_note" ADD CONSTRAINT "FK_e263909ca4fe5d57f8d4230dd5c" FOREIGN KEY ("noteId") REFERENCES "note"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`ALTER TABLE "poll" ADD CONSTRAINT "UQ_da851e06d0dfe2ef397d8b1bf1b" UNIQUE ("noteId")`);
+        await queryRunner.query(`ALTER TABLE "poll" ADD CONSTRAINT "FK_da851e06d0dfe2ef397d8b1bf1b" FOREIGN KEY ("noteId") REFERENCES "note"("id") ON DELETE CASCADE ON UPDATE NO ACTION`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."muterId" IS NULL`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."muteeId" IS NULL`);
+        await queryRunner.query(`COMMENT ON COLUMN "renote_muting"."createdAt" IS NULL`);
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "errorImageUrl" SET DEFAULT 'https://xn--931a.moe/aiart/yubitun.png'`);
+        await queryRunner.query(`ALTER TABLE "meta" ALTER COLUMN "mascotImageUrl" SET DEFAULT '/assets/ai.png'`);
+        await queryRunner.query(`ALTER TABLE "antenna" ALTER COLUMN "lastUsedAt" SET DEFAULT '2023-04-13 18:46:24.168209-04'`);
+        await queryRunner.query(`COMMENT ON COLUMN "ad"."startsAt" IS NULL`);
+        await queryRunner.query(`COMMENT ON COLUMN "user"."isRoot" IS 'Whether the User is the admin.'`);
+        await queryRunner.query(`COMMENT ON COLUMN "note"."eventId" IS 'The ID of child event'`);
+        await queryRunner.query(`ALTER TABLE "note" DROP CONSTRAINT "UQ_3af9380f266b7046cce9c992197"`);
+        await queryRunner.query(`ALTER TABLE "note" DROP COLUMN "eventId"`);
+        await queryRunner.query(`DROP INDEX "public"."IDX_785ee5fc1ea38a1b9b38ff88e5"`);
+        await queryRunner.query(`DROP TABLE "event"`);
+        await queryRunner.query(`CREATE INDEX "IDX_renote_muting_muterId" ON "muting" ("muterId") `);
+        await queryRunner.query(`CREATE INDEX "IDX_renote_muting_muteeId" ON "muting" ("muteeId") `);
+        await queryRunner.query(`CREATE INDEX "IDX_renote_muting_createdAt" ON "muting" ("createdAt") `);
+        await queryRunner.query(`CREATE INDEX "IDX_2cd3b2a6b4cf0b910b260afe08" ON "instance" ("firstRetrievedAt") `);
+    }
+}
diff --git a/packages/backend/src/postgres.ts b/packages/backend/src/postgres.ts
index bb21ed827e..4bbf1d0f4d 100644
--- a/packages/backend/src/postgres.ts
+++ b/packages/backend/src/postgres.ts
@@ -24,6 +24,7 @@ import { ClipFavorite } from '@/models/entities/ClipFavorite.js';
 import { DriveFile } from '@/models/entities/DriveFile.js';
 import { DriveFolder } from '@/models/entities/DriveFolder.js';
 import { Emoji } from '@/models/entities/Emoji.js';
+import { Event } from '@/models/entities/Event.js';
 import { Following } from '@/models/entities/Following.js';
 import { FollowRequest } from '@/models/entities/FollowRequest.js';
 import { GalleryLike } from '@/models/entities/GalleryLike.js';
@@ -155,6 +156,7 @@ export const entities = [
 	Poll,
 	PollVote,
 	Emoji,
+	Event,
 	Hashtag,
 	SwSubscription,
 	AbuseUserReport,