diff --git a/src/components/PastEntryCalendar/MonthlySummary.tsx b/src/components/PastEntryCalendar/MonthlySummary.tsx
new file mode 100644
index 0000000..797000a
--- /dev/null
+++ b/src/components/PastEntryCalendar/MonthlySummary.tsx
@@ -0,0 +1,196 @@
+import {
+  RecordLeaveInput,
+  RecordTimesheetInput,
+} from "@/app/api/timesheets/actions";
+import {
+  Box,
+  Card,
+  CardActionArea,
+  CardContent,
+  Stack,
+  Typography,
+} from "@mui/material";
+import union from "lodash/union";
+import { useCallback, useMemo } from "react";
+import dayjs, { Dayjs } from "dayjs";
+import { getHolidayForDate } from "@/app/utils/holidayUtils";
+import { HolidaysResult } from "@/app/api/holidays";
+import { manhourFormatter, shortDateFormatter } from "@/app/utils/formatUtil";
+import { useTranslation } from "react-i18next";
+import pickBy from "lodash/pickBy";
+
+interface Props {
+  currentMonth: Dayjs;
+  timesheet: RecordTimesheetInput;
+  leaves: RecordLeaveInput;
+  companyHolidays: HolidaysResult[];
+  onDateSelect: (date: string) => void;
+}
+
+const MonthlySummary: React.FC<Props> = ({
+  timesheet,
+  leaves,
+  currentMonth,
+  companyHolidays,
+  onDateSelect,
+}) => {
+  const {
+    t,
+    i18n: { language },
+  } = useTranslation("home");
+
+  const timesheetForCurrentMonth = useMemo(() => {
+    return pickBy(timesheet, (_, date) => {
+      return currentMonth.isSame(dayjs(date), "month");
+    });
+  }, [currentMonth, timesheet]);
+
+  const leavesForCurrentMonth = useMemo(() => {
+    return pickBy(leaves, (_, date) => {
+      return currentMonth.isSame(dayjs(date), "month");
+    });
+  }, [currentMonth, leaves]);
+
+  const days = useMemo(() => {
+    return union(
+      Object.keys(timesheetForCurrentMonth),
+      Object.keys(leavesForCurrentMonth),
+    );
+  }, [timesheetForCurrentMonth, leavesForCurrentMonth]).sort();
+
+  const makeSelectDate = useCallback(
+    (date: string) => () => {
+      onDateSelect(date);
+    },
+    [onDateSelect],
+  );
+
+  return (
+    <Stack
+      gap={2}
+      marginBlockEnd={2}
+      minWidth={{ sm: 375 }}
+      maxHeight={{ sm: 500 }}
+    >
+      <Typography variant="overline">{t("Monthly Summary")}</Typography>
+      <Box sx={{ overflowY: "scroll" }} flex={1}>
+        {days.map((day, index) => {
+          const dayJsObj = dayjs(day);
+
+          const holiday = getHolidayForDate(day, companyHolidays);
+          const isHoliday =
+            holiday || dayJsObj.day() === 0 || dayJsObj.day() === 6;
+
+          const ls = leavesForCurrentMonth[day];
+          const leaveHours =
+            ls?.reduce((acc, entry) => acc + entry.inputHours, 0) || 0;
+
+          const ts = timesheetForCurrentMonth[day];
+          const timesheetNormalHours =
+            ts?.reduce((acc, entry) => acc + (entry.inputHours || 0), 0) || 0;
+          const timesheetOtHours =
+            ts?.reduce((acc, entry) => acc + (entry.otHours || 0), 0) || 0;
+
+          const timesheetHours = timesheetNormalHours + timesheetOtHours;
+
+          return (
+            <Card
+              key={`${day}-${index}`}
+              sx={{ marginBlockEnd: 2, marginInline: 2 }}
+            >
+              <CardActionArea onClick={makeSelectDate(day)}>
+                <CardContent sx={{ padding: 3 }}>
+                  <Typography
+                    variant="overline"
+                    component="div"
+                    sx={{
+                      color: isHoliday ? "error.main" : undefined,
+                    }}
+                  >
+                    {shortDateFormatter(language).format(dayJsObj.toDate())}
+                    {holiday && (
+                      <Typography
+                        marginInlineStart={1}
+                        variant="caption"
+                      >{`(${holiday.title})`}</Typography>
+                    )}
+                  </Typography>
+                  <Stack spacing={1}>
+                    <Box
+                      sx={{
+                        display: "flex",
+                        justifyContent: "space-between",
+                        flexWrap: "wrap",
+                        alignItems: "baseline",
+                      }}
+                    >
+                      <Typography variant="body2">
+                        {t("Timesheet Hours")}
+                      </Typography>
+                      <Typography>
+                        {manhourFormatter.format(timesheetHours)}
+                      </Typography>
+                    </Box>
+                    <Box
+                      sx={{
+                        display: "flex",
+                        justifyContent: "space-between",
+                        flexWrap: "wrap",
+                        alignItems: "baseline",
+                      }}
+                    >
+                      <Typography variant="body2">
+                        {t("Leave Hours")}
+                      </Typography>
+                      <Typography>
+                        {manhourFormatter.format(leaveHours)}
+                      </Typography>
+                    </Box>
+
+                    <Box
+                      sx={{
+                        display: "flex",
+                        justifyContent: "space-between",
+                        flexWrap: "wrap",
+                        alignItems: "baseline",
+                      }}
+                    >
+                      <Typography variant="body2">
+                        {t("Daily Total Hours")}
+                      </Typography>
+                      <Typography>
+                        {manhourFormatter.format(timesheetHours + leaveHours)}
+                      </Typography>
+                    </Box>
+                  </Stack>
+                </CardContent>
+              </CardActionArea>
+            </Card>
+          );
+        })}
+      </Box>
+      <Typography variant="overline">
+        {`${t("Total Monthly Work Hours")}: ${manhourFormatter.format(
+          Object.values(timesheetForCurrentMonth)
+            .flatMap((entries) => entries)
+            .map((entry) => (entry.inputHours ?? 0) + (entry.otHours ?? 0))
+            .reduce((acc, cur) => {
+              return acc + cur;
+            }, 0),
+        )}`}
+      </Typography>
+      <Typography variant="overline">
+        {`${t("Total Monthly Leave Hours")}: ${manhourFormatter.format(
+          Object.values(leavesForCurrentMonth)
+            .flatMap((entries) => entries)
+            .map((entry) => entry.inputHours)
+            .reduce((acc, cur) => {
+              return acc + cur;
+            }, 0),
+        )}`}
+      </Typography>
+    </Stack>
+  );
+};
+
+export default MonthlySummary;
diff --git a/src/components/PastEntryCalendar/PastEntryCalendar.tsx b/src/components/PastEntryCalendar/PastEntryCalendar.tsx
index a9e6a14..91c0012 100644
--- a/src/components/PastEntryCalendar/PastEntryCalendar.tsx
+++ b/src/components/PastEntryCalendar/PastEntryCalendar.tsx
@@ -26,6 +26,7 @@ export interface Props {
   timesheet: RecordTimesheetInput;
   leaves: RecordLeaveInput;
   onDateSelect: (date: string) => void;
+  onMonthChange: (day: Dayjs) => void;
 }
 
 const getColor = (
@@ -72,6 +73,7 @@ const PastEntryCalendar: React.FC<Props> = ({
   timesheet,
   leaves,
   onDateSelect,
+  onMonthChange,
 }) => {
   const {
     i18n: { language },
@@ -88,6 +90,7 @@ const PastEntryCalendar: React.FC<Props> = ({
     >
       <DateCalendar
         onChange={onChange}
+        onMonthChange={onMonthChange}
         disableFuture
         // eslint-disable-next-line @typescript-eslint/no-explicit-any
         slots={{ day: EntryDay as any }}
diff --git a/src/components/PastEntryCalendar/PastEntryCalendarModal.tsx b/src/components/PastEntryCalendar/PastEntryCalendarModal.tsx
index b425d3d..c0522e1 100644
--- a/src/components/PastEntryCalendar/PastEntryCalendarModal.tsx
+++ b/src/components/PastEntryCalendar/PastEntryCalendarModal.tsx
@@ -20,12 +20,17 @@ import { ProjectWithTasks } from "@/app/api/projects";
 import { LeaveType } from "@/app/api/timesheets";
 import useIsMobile from "@/app/utils/useIsMobile";
 import FullscreenModal from "../FullscreenModal";
+import MonthlySummary from "./MonthlySummary";
+import { HolidaysResult } from "@/app/api/holidays";
+import dayjs from "dayjs";
 
-interface Props extends Omit<PastEntryCalendarProps, "onDateSelect"> {
+interface Props
+  extends Omit<PastEntryCalendarProps, "onDateSelect" | "onMonthChange"> {
   open: boolean;
   handleClose: () => void;
   leaveTypes: LeaveType[];
   allProjects: ProjectWithTasks[];
+  companyHolidays: HolidaysResult[];
 }
 
 const Indicator = styled(Box)(() => ({
@@ -45,6 +50,7 @@ const PastEntryCalendarModal: React.FC<Props> = ({
   const { t } = useTranslation("home");
 
   const [selectedDate, setSelectedDate] = useState("");
+  const [currentMonth, setMonthChange] = useState(dayjs());
 
   const clearDate = useCallback(() => {
     setSelectedDate("");
@@ -54,40 +60,52 @@ const PastEntryCalendarModal: React.FC<Props> = ({
     handleClose();
   }, [handleClose]);
 
-  const content = selectedDate ? (
-    <>
-      <PastEntryList
-        date={selectedDate}
-        timesheet={timesheet}
-        leaves={leaves}
-        allProjects={allProjects}
-        leaveTypes={leaveTypes}
-      />
-    </>
-  ) : (
-    <>
-      <Stack marginBlockEnd={2}>
-        <Box display="flex" alignItems="center" gap={1}>
-          <Indicator sx={{ backgroundColor: "info.light" }} />
-          <Typography variant="caption">{t("Has timesheet entry")}</Typography>
-        </Box>
-        <Box display="flex" alignItems="center" gap={1}>
-          <Indicator sx={{ backgroundColor: "warning.light" }} />
-          <Typography variant="caption">{t("Has leave entry")}</Typography>
-        </Box>
-        <Box display="flex" alignItems="center" gap={1}>
-          <Indicator sx={{ backgroundColor: "success.light" }} />
-          <Typography variant="caption">
-            {t("Has both timesheet and leave entry")}
-          </Typography>
-        </Box>
-      </Stack>
-      <PastEntryCalendar
-        timesheet={timesheet}
-        leaves={leaves}
-        onDateSelect={setSelectedDate}
-      />
-    </>
+  const content = (
+    <Box sx={{ display: "flex", flexDirection: { xs: "column", sm: "row" } }}>
+      <Box>
+        <Stack marginBlockEnd={2}>
+          <Box display="flex" alignItems="center" gap={1}>
+            <Indicator sx={{ backgroundColor: "info.light" }} />
+            <Typography variant="caption">
+              {t("Has timesheet entry")}
+            </Typography>
+          </Box>
+          <Box display="flex" alignItems="center" gap={1}>
+            <Indicator sx={{ backgroundColor: "warning.light" }} />
+            <Typography variant="caption">{t("Has leave entry")}</Typography>
+          </Box>
+          <Box display="flex" alignItems="center" gap={1}>
+            <Indicator sx={{ backgroundColor: "success.light" }} />
+            <Typography variant="caption">
+              {t("Has both timesheet and leave entry")}
+            </Typography>
+          </Box>
+        </Stack>
+        <PastEntryCalendar
+          timesheet={timesheet}
+          leaves={leaves}
+          onDateSelect={setSelectedDate}
+          onMonthChange={setMonthChange}
+        />
+      </Box>
+      {selectedDate ? (
+        <PastEntryList
+          date={selectedDate}
+          timesheet={timesheet}
+          leaves={leaves}
+          allProjects={allProjects}
+          leaveTypes={leaveTypes}
+        />
+      ) : (
+        <MonthlySummary
+          currentMonth={currentMonth}
+          timesheet={timesheet}
+          leaves={leaves}
+          companyHolidays={[]}
+          onDateSelect={setSelectedDate}
+        />
+      )}
+    </Box>
   );
 
   const isMobile = useIsMobile();
@@ -115,14 +133,14 @@ const PastEntryCalendarModal: React.FC<Props> = ({
               startIcon={<ArrowBack />}
               onClick={clearDate}
             >
-              {t("Back")}
+              {t("Back to Monthly Summary")}
             </Button>
           )}
         </Box>
       </Box>
     </FullscreenModal>
   ) : (
-    <Dialog onClose={onClose} open={open}>
+    <Dialog onClose={onClose} open={open} maxWidth="md">
       <DialogTitle>{t("Past Entries")}</DialogTitle>
       <DialogContent>{content}</DialogContent>
       {selectedDate && (
@@ -132,7 +150,7 @@ const PastEntryCalendarModal: React.FC<Props> = ({
             startIcon={<ArrowBack />}
             onClick={clearDate}
           >
-            {t("Back")}
+            {t("Back to Monthly Summary")}
           </Button>
         </DialogActions>
       )}
diff --git a/src/components/PastEntryCalendar/PastEntryList.tsx b/src/components/PastEntryCalendar/PastEntryList.tsx
index 35fbb3c..a2a5d9c 100644
--- a/src/components/PastEntryCalendar/PastEntryList.tsx
+++ b/src/components/PastEntryCalendar/PastEntryList.tsx
@@ -57,7 +57,12 @@ const PastEntryList: React.FC<Props> = ({
   const dayJsObj = dayjs(date);
 
   return (
-    <Stack gap={2} marginBlockEnd={2} minWidth={{ sm: 375 }}>
+    <Stack
+      gap={2}
+      marginBlockEnd={2}
+      minWidth={{ sm: 375 }}
+      maxHeight={{ sm: 500 }}
+    >
       <Typography
         variant="overline"
         color={dayJsObj.day() === 0 ? "error.main" : undefined}
@@ -94,17 +99,25 @@ const PastEntryList: React.FC<Props> = ({
             leaveTypeMap={leaveTypeMap}
           />
         ))}
-        <Typography
-          variant="overline"
-        >
-          {t("Total Work Hours")}: {manhourFormatter.format(timeEntries.map(entry => (entry.inputHours ?? 0) + (entry.otHours ?? 0)).reduce((acc, cur) => { return acc + cur }, 0))}
-        </Typography>
-        <Typography
-          variant="overline"
-        >
-          {t("Total Leave Hours")}: {manhourFormatter.format(leaveEntries.map(entry => entry.inputHours).reduce((acc, cur) => { return acc + cur }, 0))}
-        </Typography>
       </Box>
+      <Typography variant="overline">
+        {`${t("Total Work Hours")}: ${manhourFormatter.format(
+          timeEntries
+            .map((entry) => (entry.inputHours ?? 0) + (entry.otHours ?? 0))
+            .reduce((acc, cur) => {
+              return acc + cur;
+            }, 0),
+        )}`}
+      </Typography>
+      <Typography variant="overline">
+        {`${t("Total Leave Hours")}: ${manhourFormatter.format(
+          leaveEntries
+            .map((entry) => entry.inputHours)
+            .reduce((acc, cur) => {
+              return acc + cur;
+            }, 0),
+        )}`}
+      </Typography>
     </Stack>
   );
 };
diff --git a/src/components/TimeLeaveModal/TimeLeaveInputTable.tsx b/src/components/TimeLeaveModal/TimeLeaveInputTable.tsx
index d102ce0..b858a60 100644
--- a/src/components/TimeLeaveModal/TimeLeaveInputTable.tsx
+++ b/src/components/TimeLeaveModal/TimeLeaveInputTable.tsx
@@ -102,7 +102,7 @@ const TimeLeaveInputTable: React.FC<Props> = ({
     }, {});
   }, [assignedProjects]);
 
-  const { getValues, setValue, clearErrors } =
+  const { getValues, setValue, clearErrors, setError } =
     useFormContext<RecordTimeLeaveInput>();
   const currentEntries = getValues(day);
 
@@ -486,8 +486,13 @@ const TimeLeaveInputTable: React.FC<Props> = ({
       .filter((e): e is TimeLeaveEntry => Boolean(e));
 
     setValue(day, newEntries);
-    clearErrors(day);
-  }, [getValues, entries, setValue, day, clearErrors]);
+
+    if (entries.some((e) => e._isNew)) {
+      setError(day, { message: "There are some unsaved entries." });
+    } else {
+      clearErrors(day);
+    }
+  }, [getValues, entries, setValue, day, clearErrors, setError]);
 
   const hasOutOfPlannedStages = entries.some(
     (entry) => entry._isPlanned !== undefined && !entry._isPlanned,
diff --git a/src/components/UserWorkspacePage/UserWorkspacePage.tsx b/src/components/UserWorkspacePage/UserWorkspacePage.tsx
index ac9aede..63ab31d 100644
--- a/src/components/UserWorkspacePage/UserWorkspacePage.tsx
+++ b/src/components/UserWorkspacePage/UserWorkspacePage.tsx
@@ -154,6 +154,7 @@ const UserWorkspacePage: React.FC<Props> = ({
         leaves={defaultLeaveRecords}
         allProjects={allProjects}
         leaveTypes={leaveTypes}
+        companyHolidays={holidays}
       />
       <TimeLeaveModal
         fastEntryEnabled={fastEntryEnabled}