diff --git a/src/app/globals.css b/src/app/globals.css
index 107225a..69a11bf 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -524,9 +524,14 @@
   justify-content: space-between;
   width: 100% !important;
 }
-.react-datepicker__day-name {
+.react-datepicker__day-name,
+.react-datepicker__day-name span {
+  font-family: var(--font-pretendard) !important;
+  font-weight: 500 !important;
+  font-size: 14px !important;
+  line-height: 20px !important;
+  letter-spacing: -0.02em !important;
   color: #64748b !important;
-  font-weight: 600 !important;
   flex: 1 !important; /* Distribute evenly */
   width: auto !important;
   line-height: 2.5rem !important; /* Mobile friendly height */
diff --git a/src/app/meet/[meetingId]/ParticipantHeader.tsx b/src/app/meet/[meetingId]/ParticipantHeader.tsx
index 96ef82d..cba04bc 100644
--- a/src/app/meet/[meetingId]/ParticipantHeader.tsx
+++ b/src/app/meet/[meetingId]/ParticipantHeader.tsx
@@ -1,6 +1,10 @@
 'use client';
+
+import { useRouter } from 'next/navigation';
+
 import { useDisclosure } from '@/shared/hooks/useDisclosure';
 import LinkShareBottomSheet from '@/shared/ui/bottom-sheet/LinkShareBottomSheet';
+import { Menu } from '@/shared/ui/menu';
 import { TopBar } from '@/shared/ui/top-bar';
 
 interface ParticipantHeaderProps {
@@ -14,24 +18,35 @@ export default function ParticipantHeader({
   url,
   className,
 }: ParticipantHeaderProps) {
+  const router = useRouter();
   const {
     isOpen: isShareOpen,
     open: openShare,
     close: closeShare,
   } = useDisclosure();
 
-  const handleRightClick = () => {
-    openShare();
-  };
+  const {
+    isOpen: isMenuOpen,
+    open: openMenu,
+    close: closeMenu,
+  } = useDisclosure();
 
   return (
     <>
-      <TopBar
-        title={title}
-        rightIcon='ic_other_share'
-        onRightClick={handleRightClick}
-        className={className}
-      />
+      <div className={`relative ${className}`}>
+        <TopBar
+          title={title}
+          leftIcon='ic_hamburger'
+          onLeftClick={openMenu}
+          rightIcon='ic_other_share'
+          onRightClick={openShare}
+        />
+
+        <Menu isOpen={isMenuOpen} onClose={closeMenu} className='top-12 left-4'>
+          <Menu.Item onClick={() => router.push('/')}>모임 생성하기</Menu.Item>
+        </Menu>
+      </div>
+
       <LinkShareBottomSheet
         isOpen={isShareOpen}
         onClose={closeShare}
diff --git a/src/features/host-range-selector/ui/ReactDatepickerAdapter.tsx b/src/features/host-range-selector/ui/ReactDatepickerAdapter.tsx
index eb8e39f..97736c6 100644
--- a/src/features/host-range-selector/ui/ReactDatepickerAdapter.tsx
+++ b/src/features/host-range-selector/ui/ReactDatepickerAdapter.tsx
@@ -205,7 +205,7 @@ export function ReactDatepickerAdapter({
             >
               <Icon name='arrow_prev' size={24} />
             </button>
-            <span className='text-xl font-bold text-slate-800'>
+            <span className='text-title-6 text-slate-800'>
               {format(date, 'M월')}
             </span>
             {showNextMonthTooltip && !nextMonthButtonDisabled ? (
@@ -266,7 +266,7 @@ export function ReactDatepickerAdapter({
             textClass = 'text-slate-300';
           } else if (isSelected) {
             bgClass = 'bg-gray-800';
-            textClass = 'text-white font-bold';
+            textClass = 'text-white';
           } else if (isInDragRange) {
             bgClass = 'bg-slate-100';
             textClass = 'text-slate-900';
@@ -290,7 +290,7 @@ export function ReactDatepickerAdapter({
               style={{ touchAction: 'none' }}
             >
               <div
-                className={`relative flex h-10 w-10 items-center justify-center rounded-lg text-base font-normal transition-colors ${bgClass} ${textClass}`}
+                className={`relative flex h-10 w-10 items-center justify-center rounded-lg transition-colors ${bgClass} ${textClass} text-body-4`}
               >
                 {day}
               </div>
diff --git a/src/features/meet-create-date/model/useDateSelect.ts b/src/features/meet-create-date/model/useDateSelect.ts
index 2ca4e81..b4f8a14 100644
--- a/src/features/meet-create-date/model/useDateSelect.ts
+++ b/src/features/meet-create-date/model/useDateSelect.ts
@@ -17,7 +17,7 @@ export function useDateSelect(hostName: string, meetingName: string) {
       hostName,
       meetingName,
     });
-    router.push(`/create?${params.toString()}`);
+    router.replace(`/create?${params.toString()}`);
   };
 
   const handleNext = async (formattedDates: string[]) => {
@@ -49,7 +49,7 @@ export function useDateSelect(hostName: string, meetingName: string) {
 
   const handleDirectVote = () => {
     if (createdMeetingId) {
-      router.push(`/meet/${createdMeetingId}`);
+      router.replace(`/meet/${createdMeetingId}`);
     }
   };
 
@@ -63,10 +63,10 @@ export function useDateSelect(hostName: string, meetingName: string) {
         });
         console.log('주최자 투표 완료');
         // 캐시 무효화를 위해 전체 페이지 새로고침으로 이동
-        window.location.href = `/meet/${createdMeetingId}`;
+        router.replace(`/meet/${createdMeetingId}`);
       } catch (error) {
         console.error('투표 실패:', error);
-        window.location.href = `/meet/${createdMeetingId}`;
+        router.replace(`/meet/${createdMeetingId}`);
       }
     }
   };
diff --git a/src/features/meet-create/ui/MeetCreatePage.tsx b/src/features/meet-create/ui/MeetCreatePage.tsx
index 5917fbe..951b2d2 100644
--- a/src/features/meet-create/ui/MeetCreatePage.tsx
+++ b/src/features/meet-create/ui/MeetCreatePage.tsx
@@ -41,7 +41,7 @@ export default function MeetCreatePage({
       hostName: hostName.trim(),
       meetingName: finalMeetingName,
     });
-    router.push(`/date?${params.toString()}`);
+    router.replace(`/date?${params.toString()}`);
   };
 
   return (
diff --git a/src/features/participant-edit-date/model/useParticipantEditDate.ts b/src/features/participant-edit-date/model/useParticipantEditDate.ts
index 7ae5f9a..1ae51b8 100644
--- a/src/features/participant-edit-date/model/useParticipantEditDate.ts
+++ b/src/features/participant-edit-date/model/useParticipantEditDate.ts
@@ -99,12 +99,16 @@ export function useParticipantEditDate(meetingId: string) {
   const successModal = useDisclosure();
 
   const handleBack = () => {
-    router.back();
+    const params = new URLSearchParams();
+    if (participantName) {
+      params.set('name', participantName);
+    }
+    router.replace(`/meet/${meetingId}/edit?${params.toString()}`);
   };
 
   const handleSuccessModalClose = () => {
     successModal.close();
-    router.push(`/meet/${meetingId}`);
+    router.replace(`/meet/${meetingId}`);
   };
 
   const handleSubmit = async () => {
diff --git a/src/features/participant-edit-name/model/useParticipantEditName.ts b/src/features/participant-edit-name/model/useParticipantEditName.ts
index 3cdfd94..8a8c128 100644
--- a/src/features/participant-edit-name/model/useParticipantEditName.ts
+++ b/src/features/participant-edit-name/model/useParticipantEditName.ts
@@ -89,7 +89,7 @@ export function useParticipantEditName(meetingId: string) {
         // 식별을 위해 encodedName을 쿼리로 넘기는 방식을 채택 (간단한 구현)
         const params = new URLSearchParams();
         params.set('name', trimmedName);
-        router.push(`/meet/${meetingId}/edit/date?${params.toString()}`);
+        router.replace(`/meet/${meetingId}/edit/date?${params.toString()}`);
       } else {
         // 실패 케이스: 참여 이력 없음
         setErrorDetails({
diff --git a/src/features/participant-register-date/model/useParticipantRegisterDate.ts b/src/features/participant-register-date/model/useParticipantRegisterDate.ts
index c834c53..7726f93 100644
--- a/src/features/participant-register-date/model/useParticipantRegisterDate.ts
+++ b/src/features/participant-register-date/model/useParticipantRegisterDate.ts
@@ -89,12 +89,16 @@ export function useParticipantRegisterDate(meetingId: string) {
   const successModal = useDisclosure();
 
   const handleBack = () => {
-    router.back();
+    const params = new URLSearchParams();
+    if (participantName) {
+      params.set('name', participantName);
+    }
+    router.replace(`/meet/${meetingId}/register?${params.toString()}`);
   };
 
   const handleSuccessModalClose = () => {
     successModal.close();
-    router.push(`/meet/${meetingId}`);
+    router.replace(`/meet/${meetingId}`);
   };
 
   const handleSubmit = async () => {
diff --git a/src/features/participant-register-name/model/useParticipantRegisterName.ts b/src/features/participant-register-name/model/useParticipantRegisterName.ts
index c81c241..1b571c6 100644
--- a/src/features/participant-register-name/model/useParticipantRegisterName.ts
+++ b/src/features/participant-register-name/model/useParticipantRegisterName.ts
@@ -87,7 +87,7 @@ export function useParticipantRegisterName(meetingId: string) {
         const params = new URLSearchParams();
         params.set('name', trimmedName);
         // [수정] 이동 경로: register/date
-        router.push(`/meet/${meetingId}/register/date?${params.toString()}`);
+        router.replace(`/meet/${meetingId}/register/date?${params.toString()}`);
       }
     } catch (error) {
       console.error('Failed to check participant existence:', error);
diff --git a/src/features/vote-results-calendar/ui/ReactDatepicker.tsx b/src/features/vote-results-calendar/ui/ReactDatepicker.tsx
index a643032..e88feb4 100644
--- a/src/features/vote-results-calendar/ui/ReactDatepicker.tsx
+++ b/src/features/vote-results-calendar/ui/ReactDatepicker.tsx
@@ -99,13 +99,13 @@ export function ReactDatePickerVoteResultsCalendar({
         if (votes > 0) {
           if (focusedParticipant) {
             bgClass = 'bg-gray-800';
-            textClass = 'text-white font-bold';
+            textClass = 'text-white';
           } else if (rank && rank <= 3) {
             bgClass = 'bg-blue-100 shadow-sm';
-            textClass = 'text-white font-bold';
+            textClass = 'text-white';
           } else {
             bgClass = 'bg-blue-30';
-            textClass = 'text-blue-100 font-medium';
+            textClass = 'text-blue-100';
           }
         } else {
           bgClass = 'hover:bg-slate-100';
@@ -126,16 +126,18 @@ export function ReactDatePickerVoteResultsCalendar({
     return (
       <div className='flex h-full w-full items-center justify-center py-1'>
         <div
-          className={cn(
-            'relative flex h-9 w-9 items-center justify-center rounded-lg text-base font-normal transition-colors sm:h-10 sm:w-10',
-            bgClass,
-            textClass,
-            selectedClass,
-            isInteractive && !isSelected && 'hover:brightness-95',
-            !isInteractive && 'pointer-events-none text-slate-300',
-            isFilteredOut && 'text-slate-900',
-            isInteractive && 'pointer-events-auto cursor-pointer',
-          )}
+          className={
+            cn(
+              'relative flex h-9 w-9 items-center justify-center rounded-lg transition-colors sm:h-10 sm:w-10',
+              bgClass,
+              textClass,
+              selectedClass,
+              isInteractive && !isSelected && 'hover:brightness-95',
+              !isInteractive && 'pointer-events-none text-slate-300',
+              isFilteredOut && 'text-slate-900',
+              isInteractive && 'pointer-events-auto cursor-pointer',
+            ) + ' text-body-4'
+          }
         >
           {day}
 
@@ -184,7 +186,7 @@ export function ReactDatePickerVoteResultsCalendar({
               >
                 <Icon name='arrow_prev' size={24} />
               </button>
-              <span className='text-xl font-bold text-slate-800'>
+              <span className='text-title-6 text-slate-800'>
                 {format(date, 'M월')}
               </span>
               <button
diff --git a/src/shared/ui/menu/Menu.tsx b/src/shared/ui/menu/Menu.tsx
new file mode 100644
index 0000000..3959137
--- /dev/null
+++ b/src/shared/ui/menu/Menu.tsx
@@ -0,0 +1,71 @@
+'use client';
+
+import { ReactNode, useRef } from 'react';
+
+interface MenuProps {
+  isOpen: boolean;
+  onClose: () => void;
+  // position prop은 나중에 필요하다면 확장 가능하며, 현재는 absolute positioning을 기본으로 사용합니다.
+  // 완전히 일반적인 컴포넌트로 만들려면 구체적인 위치 지정 로직이 필요할 수 있습니다(예: 라이브러리 또는 유연한 클래스 사용).
+  // 지금은 className으로 위치를 재정의할 수 있도록 합니다.
+  className?: string;
+  children: ReactNode;
+}
+
+function MenuMain({ isOpen, onClose, className, children }: MenuProps) {
+  const menuRef = useRef<HTMLDivElement>(null);
+
+  // 부모 컴포넌트나 백드롭에서 처리하지 않는 경우, 외부 클릭 시 닫기 로직을 여기에 추가할 수 있습니다.
+  // 현재 디자인은 단순함을 위해 고정된 백드롭을 사용합니다.
+
+  if (!isOpen) return null;
+
+  return (
+    <>
+      <div
+        ref={menuRef}
+        className={`animate-fade-in-down absolute z-50 flex min-w-[160px] flex-col overflow-hidden rounded-xl border border-gray-100 bg-white shadow-lg ${
+          className || ''
+        }`}
+      >
+        {children}
+      </div>
+      {/* Backdrop */}
+      <div
+        className='fixed inset-0 z-40 bg-transparent'
+        onClick={onClose}
+        aria-hidden='true'
+      />
+    </>
+  );
+}
+
+interface MenuItemProps {
+  children: ReactNode;
+  onClick?: () => void;
+  className?: string;
+}
+
+function MenuItem({ children, onClick, className }: MenuItemProps) {
+  return (
+    <button
+      type='button'
+      onClick={onClick}
+      className={`text-body-2 hover:bg-primary-50 active:bg-primary-100 flex w-full items-center px-4 py-3 text-left text-gray-800 transition-colors ${
+        className || ''
+      }`}
+    >
+      {children}
+    </button>
+  );
+}
+
+// Menu를 위한 Divider 스타일 컴포넌트
+function MenuDivider() {
+  return <div className='h-px w-full bg-gray-100' />;
+}
+
+export const Menu = Object.assign(MenuMain, {
+  Item: MenuItem,
+  Divider: MenuDivider,
+});
diff --git a/src/shared/ui/menu/index.ts b/src/shared/ui/menu/index.ts
new file mode 100644
index 0000000..81b9371
--- /dev/null
+++ b/src/shared/ui/menu/index.ts
@@ -0,0 +1 @@
+export { Menu } from './Menu';