diff --git a/web/src/components/ActivityCalendar/MonthCalendar.tsx b/web/src/components/ActivityCalendar/MonthCalendar.tsx
index 891a285be..f16354fcf 100644
--- a/web/src/components/ActivityCalendar/MonthCalendar.tsx
+++ b/web/src/components/ActivityCalendar/MonthCalendar.tsx
@@ -1,3 +1,4 @@
+import dayjs from "dayjs";
 import { memo, useMemo } from "react";
 import { useInstance } from "@/contexts/InstanceContext";
 import { cn } from "@/lib/utils";
@@ -35,11 +36,15 @@ const WeekdayHeader = memo(({ weekDays, size }: WeekdayHeaderProps) => (
 WeekdayHeader.displayName = "WeekdayHeader";
 
 export const MonthCalendar = memo((props: MonthCalendarProps) => {
-  const { month, data, maxCount, size = "default", onClick, className, disableTooltips = false } = props;
+  const { month, selectedDate, data, maxCount, size = "default", onClick, className, disableTooltips = false } = props;
   const t = useTranslate();
   const { generalSetting } = useInstance();
   const today = useTodayDate();
   const weekDays = useWeekdayLabels();
+  const selectedDateFormatted = useMemo(() => {
+    if (!selectedDate) return null;
+    return dayjs(selectedDate).format("YYYY-MM-DD");
+  }, [selectedDate]);
 
   const { weeks, weekDays: rotatedWeekDays } = useCalendarMatrix({
     month,
@@ -47,7 +52,7 @@ export const MonthCalendar = memo((props: MonthCalendarProps) => {
     weekDays,
     weekStartDayOffset: generalSetting.weekStartDayOffset,
     today,
-    selectedDate: "",
+    selectedDate: selectedDateFormatted,
   });
 
   const flatDays = useMemo(() => weeks.flatMap((week) => week.days), [weeks]);
diff --git a/web/src/components/ActivityCalendar/YearCalendar.tsx b/web/src/components/ActivityCalendar/YearCalendar.tsx
index e8b8f91f9..d03f10840 100644
--- a/web/src/components/ActivityCalendar/YearCalendar.tsx
+++ b/web/src/components/ActivityCalendar/YearCalendar.tsx
@@ -73,12 +73,21 @@ interface MonthCardProps {
   data: Record<string, number>;
   maxCount: number;
   onDateClick: (date: string) => void;
+  selectedDate: string | null;
 }
 
-const MonthCard = memo(({ month, data, maxCount, onDateClick }: MonthCardProps) => (
+const MonthCard = memo(({ month, data, maxCount, onDateClick, selectedDate }: MonthCardProps) => (
   <article className="flex flex-col gap-2 rounded-xl border border-border/20 bg-muted/5 p-3 transition-colors hover:bg-muted/10">
     <header className="text-[10px] font-medium text-muted-foreground/80 uppercase tracking-widest">{getMonthLabel(month)}</header>
-    <MonthCalendar month={month} data={data} maxCount={maxCount} size="small" onClick={onDateClick} disableTooltips />
+    <MonthCalendar
+      month={month}
+      data={data}
+      maxCount={maxCount}
+      size="small"
+      onClick={onDateClick}
+      selectedDate={selectedDate}
+      disableTooltips
+    />
   </article>
 ));
 MonthCard.displayName = "MonthCard";
@@ -106,7 +115,7 @@ export const YearCalendar = memo(({ selectedYear, data, onYearChange, onDateClic
 
       <div className="grid gap-4 grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 animate-fade-in">
         {months.map((month) => (
-          <MonthCard key={month} month={month} data={yearData} maxCount={yearMaxCount} onDateClick={onDateClick} />
+          <MonthCard key={month} month={month} data={yearData} maxCount={yearMaxCount} onDateClick={onDateClick} selectedDate={null} />
         ))}
       </div>
     </section>
diff --git a/web/src/components/ActivityCalendar/types.ts b/web/src/components/ActivityCalendar/types.ts
index 306b21b9b..98dc7c2aa 100644
--- a/web/src/components/ActivityCalendar/types.ts
+++ b/web/src/components/ActivityCalendar/types.ts
@@ -22,6 +22,7 @@ export interface CalendarMatrixResult {
 
 export interface MonthCalendarProps {
   month: string;
+  selectedDate: string | null;
   data: Record<string, number>;
   maxCount: number;
   size?: CalendarSize;
diff --git a/web/src/components/ActivityCalendar/useCalendar.ts b/web/src/components/ActivityCalendar/useCalendar.ts
index 783767e44..91ba23fd4 100644
--- a/web/src/components/ActivityCalendar/useCalendar.ts
+++ b/web/src/components/ActivityCalendar/useCalendar.ts
@@ -9,7 +9,7 @@ export interface UseCalendarMatrixParams {
   weekDays: string[];
   weekStartDayOffset: number;
   today: string;
-  selectedDate: string;
+  selectedDate: string | null;
 }
 
 const createCalendarDayCell = (
@@ -17,7 +17,7 @@ const createCalendarDayCell = (
   monthKey: string,
   data: Record<string, number>,
   today: string,
-  selectedDate: string,
+  selectedDate: string | null,
 ): CalendarDayCell => {
   const isoDate = current.format("YYYY-MM-DD");
   const isCurrentMonth = current.format("YYYY-MM") === monthKey;
diff --git a/web/src/components/StatisticsView/StatisticsView.tsx b/web/src/components/StatisticsView/StatisticsView.tsx
index 62e135186..f88d18174 100644
--- a/web/src/components/StatisticsView/StatisticsView.tsx
+++ b/web/src/components/StatisticsView/StatisticsView.tsx
@@ -1,7 +1,7 @@
 import dayjs from "dayjs";
 import { useMemo, useState } from "react";
 import { MonthCalendar } from "@/components/ActivityCalendar";
-import { useDateFilterNavigation } from "@/hooks";
+import { type MemoFilter, useMemoFilterContext } from "@/contexts/MemoFilterContext";
 import type { StatisticsData } from "@/types/statistics";
 import { MonthNavigator } from "./MonthNavigator";
 
@@ -12,20 +12,44 @@ interface Props {
 const StatisticsView = (props: Props) => {
   const { statisticsData } = props;
   const { activityStats } = statisticsData;
-  const navigateToDateFilter = useDateFilterNavigation();
   const [visibleMonthString, setVisibleMonthString] = useState(dayjs().format("YYYY-MM"));
+  const { getFiltersByFactor, addFilter, removeFilter } = useMemoFilterContext();
+  const displayTimeFilter = getFiltersByFactor("displayTime").length > 0 ? getFiltersByFactor("displayTime") : [];
+  const selectedDate = useMemo(() => {
+    if (!displayTimeFilter.length) return null;
+    return new Date(displayTimeFilter[0].value);
+  }, [displayTimeFilter]);
 
   const maxCount = useMemo(() => {
     const counts = Object.values(activityStats);
     return Math.max(...counts, 1);
   }, [activityStats]);
 
+  const handleDateCellClick = (date: string) => {
+    if (displayTimeFilter.length > 0 && displayTimeFilter[0].value === date) {
+      removeFilter((f: MemoFilter) => f.factor === "displayTime" && f.value === date);
+    } else {
+      // Remove all existing tag filters first, then add the new one
+      removeFilter((f: MemoFilter) => f.factor === "displayTime");
+      addFilter({
+        factor: "displayTime",
+        value: date,
+      });
+    }
+  };
+
   return (
     <div className="group w-full mt-2 flex flex-col text-muted-foreground animate-fade-in">
       <MonthNavigator visibleMonth={visibleMonthString} onMonthChange={setVisibleMonthString} activityStats={activityStats} />
 
       <div className="w-full animate-scale-in">
-        <MonthCalendar month={visibleMonthString} data={activityStats} maxCount={maxCount} onClick={navigateToDateFilter} />
+        <MonthCalendar
+          month={visibleMonthString}
+          selectedDate={selectedDate ? selectedDate.toDateString() : null}
+          data={activityStats}
+          maxCount={maxCount}
+          onClick={handleDateCellClick}
+        />
       </div>
     </div>
   );