diff --git a/locales/index.d.ts b/locales/index.d.ts
index c07e564dd7..e470ab846c 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -3162,10 +3162,6 @@ export interface Locale extends ILocale {
      * オフにすると、「みつける」にアカウントが載らなくなります。
      */
     "makeExplorableDescription": string;
-    /**
-     * タイムラインのノートを離して表示
-     */
-    "showGapBetweenNotesInTimeline": string;
     /**
      * 複製
      */
diff --git a/packages/frontend/src/components/MkStreamingNotesTimeline.vue b/packages/frontend/src/components/MkStreamingNotesTimeline.vue
index f8b7f3b2fd..f7cf07e004 100644
--- a/packages/frontend/src/components/MkStreamingNotesTimeline.vue
+++ b/packages/frontend/src/components/MkStreamingNotesTimeline.vue
@@ -35,7 +35,15 @@ SPDX-License-Identifier: AGPL-3.0-only
 			tag="div"
 		>
 			<template v-for="(note, i) in paginator.items.value" :key="note.id">
-				<div v-if="note._shouldInsertAd_" :data-scroll-anchor="note.id">
+				<div v-if="i > 0 && isSeparatorNeeded(paginator.items.value[i -1].createdAt, note.createdAt)" :data-scroll-anchor="note.id">
+					<div :class="$style.date">
+						<span><i class="ti ti-chevron-up"></i> {{ getSeparatorInfo(paginator.items.value[i -1].createdAt, note.createdAt).prevText }}</span>
+						<span style="height: 1em; width: 1px; background: var(--MI_THEME-divider);"></span>
+						<span>{{ getSeparatorInfo(paginator.items.value[i -1].createdAt, note.createdAt).nextText }} <i class="ti ti-chevron-down"></i></span>
+					</div>
+					<MkNote :class="$style.note" :note="note" :withHardMute="true"/>
+				</div>
+				<div v-else-if="note._shouldInsertAd_" :data-scroll-anchor="note.id">
 					<MkNote :class="$style.note" :note="note" :withHardMute="true"/>
 					<div :class="$style.ad">
 						<MkAd :preferForms="['horizontal', 'horizontal-big']"/>
@@ -72,6 +80,7 @@ import MkButton from '@/components/MkButton.vue';
 import { i18n } from '@/i18n.js';
 import { infoImageUrl } from '@/instance.js';
 import { globalEvents, useGlobalEvent } from '@/events.js';
+import { isSeparatorNeeded, getSeparatorInfo } from '@/utility/timeline-date-separate.js';
 
 const props = withDefaults(defineProps<{
 	src: BasicTimelineType | 'mentions' | 'directs' | 'list' | 'antenna' | 'channel' | 'role';
@@ -414,17 +423,10 @@ defineExpose({
 .notes {
 	container-type: inline-size;
 	background: var(--MI_THEME-panel);
+}
 
-	.note:not(:last-child) {
-		border-bottom: solid 0.5px var(--MI_THEME-divider);
-	}
-
-	.ad {
-		padding: 8px;
-		background-size: auto auto;
-		background-image: repeating-linear-gradient(45deg, transparent, transparent 8px, var(--MI_THEME-bg) 8px, var(--MI_THEME-bg) 14px);
-		border-bottom: solid 0.5px var(--MI_THEME-divider);
-	}
+.note {
+	border-bottom: solid 0.5px var(--MI_THEME-divider);
 }
 
 .new {
@@ -501,8 +503,27 @@ defineExpose({
 	}
 }
 
-.ad:empty {
-	display: none;
+.date {
+	display: flex;
+	font-size: 85%;
+	align-items: center;
+	justify-content: center;
+	gap: 1em;
+	opacity: 0.75;
+	padding: 8px 8px;
+	margin: 0 auto;
+	border-bottom: solid 0.5px var(--MI_THEME-divider);
+}
+
+.ad {
+	padding: 8px;
+	background-size: auto auto;
+	background-image: repeating-linear-gradient(45deg, transparent, transparent 8px, var(--MI_THEME-bg) 8px, var(--MI_THEME-bg) 14px);
+	border-bottom: solid 0.5px var(--MI_THEME-divider);
+
+	&:empty {
+		display: none;
+	}
 }
 
 .more {
diff --git a/packages/frontend/src/utility/timeline-date-separate.ts b/packages/frontend/src/utility/timeline-date-separate.ts
index e1bc9790b9..1071a80962 100644
--- a/packages/frontend/src/utility/timeline-date-separate.ts
+++ b/packages/frontend/src/utility/timeline-date-separate.ts
@@ -25,6 +25,37 @@ export type DateSeparetedTimelineItem<T> = {
 	nextText: string;
 };
 
+// TODO: いちいちDateインスタンス作成するのは無駄感あるから文字列のまま解析したい
+export function isSeparatorNeeded(
+	prev: string | null,
+	next: string | null,
+) {
+	if (prev == null || next == null) return false;
+	const prevDate = new Date(prev);
+	const nextDate = new Date(next);
+	return (
+		prevDate.getFullYear() !== nextDate.getFullYear() ||
+		prevDate.getMonth() !== nextDate.getMonth() ||
+		prevDate.getDate() !== nextDate.getDate()
+	);
+}
+
+// TODO: いちいちDateインスタンス作成するのは無駄感あるから文字列のまま解析したい
+export function getSeparatorInfo(
+	prev: string | null,
+	next: string | null,
+) {
+	if (prev == null || next == null) return null;
+	const prevDate = new Date(prev);
+	const nextDate = new Date(next);
+	return {
+		prevDate,
+		prevText: getDateText(prevDate),
+		nextDate,
+		nextText: getDateText(nextDate),
+	};
+}
+
 export function makeDateSeparatedTimelineComputedRef<T extends { id: string; createdAt: string; }>(items: Ref<T[]>) {
 	return computed<DateSeparetedTimelineItem<T>[]>(() => {
 		const tl: DateSeparetedTimelineItem<T>[] = [];