diff --git a/CHANGELOG.md b/CHANGELOG.md
index db26ffc8ee..e40c5f0fd3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@
 - Fix: MFM `$[unixtime ]` に不正な値を入力した際に発生する各種エラーを修正
 
 ### Client
+- Feat: 今日誕生日のフォロー中のユーザーを一覧表示できるウィジェットを追加
 - Enhance: 絵文字のオートコンプリート機能強化 #12364
 - Enhance: ユーザーのRawデータを表示するページが復活
 - Enhance: リアクション選択時に音を鳴らせるように
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 6036c6fa66..d462816494 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -2110,6 +2110,7 @@ export interface Locale {
             "chooseList": string;
         };
         "clicker": string;
+        "birthdayFollowings": string;
     };
     "_cw": {
         "hide": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 0f4164652c..aa3cdf0750 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -2014,6 +2014,7 @@ _widgets:
   _userList:
     chooseList: "リストを選択"
   clicker: "クリッカー"
+  birthdayFollowings: "今日誕生日のユーザー"
 
 _cw:
   hide: "隠す"
diff --git a/packages/backend/migration/1700902349231-add-bday-index.js b/packages/backend/migration/1700902349231-add-bday-index.js
new file mode 100644
index 0000000000..251526fc26
--- /dev/null
+++ b/packages/backend/migration/1700902349231-add-bday-index.js
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class AddBdayIndex1700902349231 {
+    name = 'AddBdayIndex1700902349231'
+
+    async up(queryRunner) {
+      await queryRunner.query(`CREATE INDEX "IDX_de22cd2b445eee31ae51cdbe99" ON "user_profile" (SUBSTR("birthday", 6, 5))`);
+    }
+
+    async down(queryRunner) {
+			await queryRunner.query(`DROP INDEX "public"."IDX_de22cd2b445eee31ae51cdbe99"`);
+    }
+}
diff --git a/packages/backend/src/models/UserProfile.ts b/packages/backend/src/models/UserProfile.ts
index 8a43b60039..6659a01412 100644
--- a/packages/backend/src/models/UserProfile.ts
+++ b/packages/backend/src/models/UserProfile.ts
@@ -29,6 +29,7 @@ export class MiUserProfile {
 	})
 	public location: string | null;
 
+	@Index()
 	@Column('char', {
 		length: 10, nullable: true,
 		comment: 'The birthday (YYYY-MM-DD) of the User.',
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index 03487275a3..ead7ba8c40 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -42,6 +42,12 @@ export const meta = {
 			code: 'FORBIDDEN',
 			id: 'f6cdb0df-c19f-ec5c-7dbb-0ba84a1f92ba',
 		},
+
+		birthdayInvalid: {
+			message: 'Birthday date format is invalid.',
+			code: 'BIRTHDAY_DATE_FORMAT_INVALID',
+			id: 'a2b007b9-4782-4eba-abd3-93b05ed4130d',
+		},
 	},
 } as const;
 
@@ -59,6 +65,8 @@ export const paramDef = {
 			nullable: true,
 			description: 'The local host is represented with `null`.',
 		},
+
+		birthday: { type: 'string', nullable: true },
 	},
 	anyOf: [
 		{ required: ['userId'] },
@@ -117,6 +125,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				.andWhere('following.followerId = :userId', { userId: user.id })
 				.innerJoinAndSelect('following.followee', 'followee');
 
+			if (ps.birthday) {
+				try {
+					const d = new Date(ps.birthday);
+					d.setHours(0, 0, 0, 0);
+					const birthday = `${(d.getMonth() + 1).toString().padStart(2, '0')}-${d.getDate().toString().padStart(2, '0')}`;
+					const birthdayUserQuery = this.userProfilesRepository.createQueryBuilder('user_profile');
+					birthdayUserQuery.select('user_profile.userId')
+						.where(`SUBSTR(user_profile.birthday, 6, 5) = '${birthday}'`);
+
+					query.andWhere(`following.followeeId IN (${ birthdayUserQuery.getQuery() })`);
+				} catch (err) {
+					throw new ApiError(meta.errors.birthdayInvalid);
+				}
+			}
+
 			const followings = await query
 				.limit(ps.limit)
 				.getMany();
diff --git a/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue b/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue
new file mode 100644
index 0000000000..7c4455516d
--- /dev/null
+++ b/packages/frontend/src/widgets/WidgetBirthdayFollowings.vue
@@ -0,0 +1,127 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<MkContainer :showHeader="widgetProps.showHeader" class="mkw-bdayfollowings">
+	<template #icon><i class="ti ti-cake"></i></template>
+	<template #header>{{ i18n.ts._widgets.birthdayFollowings }}</template>
+
+	<div :class="$style.bdayFRoot">
+		<MkLoading v-if="fetching"/>
+		<div v-else-if="users.length > 0" :class="$style.bdayFGrid">
+			<MkAvatar v-for="user in users" :key="user.id" :user="user.followee" link preview></MkAvatar>
+		</div>
+		<div v-else :class="$style.bdayFFallback">
+			<img :src="infoImageUrl" class="_ghost" :class="$style.bdayFFallbackImage"/>
+			<div>{{ i18n.ts.nothing }}</div>
+		</div>
+	</div>
+</MkContainer>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue';
+import * as Misskey from 'misskey-js';
+import { useWidgetPropsManager, WidgetComponentEmits, WidgetComponentExpose, WidgetComponentProps } from './widget.js';
+import { GetFormResultType } from '@/scripts/form.js';
+import MkContainer from '@/components/MkContainer.vue';
+import * as os from '@/os.js';
+import { useInterval } from '@/scripts/use-interval.js';
+import { i18n } from '@/i18n.js';
+import { infoImageUrl } from '@/instance.js';
+import { $i } from '@/account.js';
+
+const name = i18n.ts._widgets.birthdayFollowings;
+
+const widgetPropsDef = {
+	showHeader: {
+		type: 'boolean' as const,
+		default: true,
+	},
+};
+
+type WidgetProps = GetFormResultType<typeof widgetPropsDef>;
+
+const props = defineProps<WidgetComponentProps<WidgetProps>>();
+const emit = defineEmits<WidgetComponentEmits<WidgetProps>>();
+
+const { widgetProps, configure } = useWidgetPropsManager(name,
+	widgetPropsDef,
+	props,
+	emit,
+);
+
+const users = ref<Misskey.entities.FollowingFolloweePopulated[]>([]);
+const fetching = ref(true);
+let lastFetchedAt = '1970-01-01';
+
+const fetch = () => {
+	if (!$i) {
+		users.value = [];
+		fetching.value = false;
+		return;
+	}
+
+	const lfAtD = new Date(lastFetchedAt);
+	lfAtD.setHours(0, 0, 0, 0);
+	const now = new Date();
+	now.setHours(0, 0, 0, 0);
+
+	if (now > lfAtD) {
+		os.api('users/following', {
+			limit: 18,
+			birthday: now.toISOString(),
+			userId: $i.id,
+		}).then(res => {
+			users.value = res;
+			fetching.value = false;
+		});
+
+		lastFetchedAt = now.toISOString();
+	}
+};
+
+useInterval(fetch, 1000 * 60, {
+	immediate: true,
+	afterMounted: true,
+});
+
+defineExpose<WidgetComponentExpose>({
+	name,
+	configure,
+	id: props.widget ? props.widget.id : null,
+});
+</script>
+
+<style lang="scss" module>
+.bdayFRoot {
+	overflow: hidden;
+	min-height: calc(calc(calc(50px * 3) - 8px) + calc(var(--margin) * 2));
+}
+.bdayFGrid {
+	display: grid;
+	grid-template-columns: repeat(6, 42px);
+	grid-template-rows: repeat(3, 42px);
+	place-content: center;
+	gap: 8px;
+	margin: var(--margin) auto;
+}
+
+.bdayFFallback {
+	height: 100%;
+	display: flex;
+	flex-direction: column;
+	justify-content: center;
+	align-items: center;
+}
+
+.bdayFFallbackImage {
+	height: 96px;
+	width: auto;
+	max-width: 90%;
+	margin-bottom: 8px;
+	border-radius: var(--radius);
+}
+</style>
diff --git a/packages/frontend/src/widgets/index.ts b/packages/frontend/src/widgets/index.ts
index 405c49ab06..36925e1bd8 100644
--- a/packages/frontend/src/widgets/index.ts
+++ b/packages/frontend/src/widgets/index.ts
@@ -33,6 +33,7 @@ export default function(app: App) {
 	app.component('WidgetAichan', defineAsyncComponent(() => import('./WidgetAichan.vue')));
 	app.component('WidgetUserList', defineAsyncComponent(() => import('./WidgetUserList.vue')));
 	app.component('WidgetClicker', defineAsyncComponent(() => import('./WidgetClicker.vue')));
+	app.component('WidgetBirthdayFollowings', defineAsyncComponent(() => import('./WidgetBirthdayFollowings.vue')));
 }
 
 export const widgets = [
@@ -63,4 +64,5 @@ export const widgets = [
 	'aichan',
 	'userList',
 	'clicker',
+	'birthdayFollowings',
 ];