diff --git a/simnet/client/components/diary/__init__.py b/simnet/client/components/diary/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/simnet/client/components/diary/base.py b/simnet/client/components/diary/base.py
new file mode 100644
index 0000000..313e992
--- /dev/null
+++ b/simnet/client/components/diary/base.py
@@ -0,0 +1,99 @@
+from datetime import timedelta, timezone, datetime
+from typing import Optional, Any, Dict
+
+from simnet.client.base import BaseClient
+from simnet.client.routes import DETAIL_LEDGER_URL, INFO_LEDGER_URL
+from simnet.models.diary import DiaryType
+from simnet.models.genshin.diary import DiaryPage
+from simnet.utils.enum_ import Region, Game
+from simnet.utils.player import recognize_server
+
+__all__ = ("BaseDiaryClient",)
+
+CN_TIMEZONE = timezone(timedelta(hours=8))
+
+
+class BaseDiaryClient(BaseClient):
+    """Base diary component."""
+
+    async def request_ledger(
+        self,
+        player_id: Optional[int] = None,
+        *,
+        game: Optional[Game] = None,
+        detail: bool = False,
+        month: Optional[int] = None,
+        lang: Optional[str] = None,
+        params: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """Make a request towards the ys ledger endpoint.
+
+        Args:
+            player_id (Optional[int], optional): The player ID to get the ledger for.
+            game (Optional[Game], optional): The game to get the ledger for.
+            detail (bool, optional): Whether to get the detailed ledger.
+            month (Optional[int], optional): The month to get the ledger for.
+            lang (Optional[str], optional): The language code to use for the request.
+            params (Optional[Dict[str, Any]], optional): The query parameters to use for the request.
+
+        Returns:
+            Dict[str, Any]: The response data.
+        """
+        game = game or self.game
+        player_id = player_id or self.player_id
+        params = params or {}
+
+        url = (
+            DETAIL_LEDGER_URL.get_url(self.region)
+            if detail
+            else INFO_LEDGER_URL.get_url(
+                self.region,
+                game,
+            )
+        )
+
+        if self.region == Region.OVERSEAS or game == Game.STARRAIL:
+            params["uid"] = player_id
+            params["region"] = recognize_server(player_id, game)
+        elif self.region == Region.CHINESE:
+            params["bind_uid"] = player_id
+            params["bind_region"] = recognize_server(player_id, game)
+        else:
+            raise TypeError(f"{self.region!r} is not a valid region.")
+        params["month"] = month or (datetime.now().strftime("%Y%m") if game == Game.STARRAIL else datetime.now().month)
+        params["lang"] = lang or self.lang
+
+        return await self.request_lab(url, params=params)
+
+    async def _get_diary_page(
+        self,
+        page: int,
+        *,
+        game: Optional[Game] = None,
+        player_id: Optional[int] = None,
+        diary_type: int = DiaryType.PRIMOGEMS,
+        month: Optional[int] = None,
+        lang: Optional[str] = None,
+    ) -> DiaryPage:
+        """Get a diary page.
+
+        Args:
+            page (int): The page number to get.
+            game (Optional[Game], optional): The game to get the diary page for.
+            player_id (Optional[int], optional): The player ID to get the diary page for.
+            diary_type (int, optional): The diary type to get the diary page for.
+            month (Optional[int], optional): The month to get the diary page for.
+            lang (Optional[str], optional): The language code to use for the request.
+
+        Returns:
+            DiaryPage: The diary page.
+        """
+        data = await self.request_ledger(
+            player_id,
+            game=game,
+            detail=True,
+            month=month,
+            lang=lang,
+            params=dict(type=diary_type, current_page=page, page_size=100),
+        )
+        return DiaryPage(**data)
diff --git a/simnet/client/components/diary/genshin.py b/simnet/client/components/diary/genshin.py
new file mode 100644
index 0000000..58d4030
--- /dev/null
+++ b/simnet/client/components/diary/genshin.py
@@ -0,0 +1,29 @@
+from typing import Optional
+
+from simnet.client.components.diary.base import BaseDiaryClient
+from simnet.models.genshin.diary import Diary
+from simnet.utils.enum_ import Game
+
+
+class GenshinDiaryClient(BaseDiaryClient):
+    """Genshin diary component."""
+
+    async def get_genshin_diary(
+        self,
+        player_id: Optional[int] = None,
+        *,
+        month: Optional[int] = None,
+        lang: Optional[str] = None,
+    ) -> Diary:
+        """Get a traveler's diary with earning details for the month.
+
+        Args:
+            player_id (int, optional): The player's ID. Defaults to None.
+            month (int, optional): The month to get the diary for. Defaults to None.
+            lang (str, optional): The language to get the diary in. Defaults to None.
+
+        Returns:
+            Diary: The diary for the month.
+        """
+        data = await self.request_ledger(player_id, game=Game.GENSHIN, month=month, lang=lang)
+        return Diary(**data)
diff --git a/simnet/client/components/diary/starrail.py b/simnet/client/components/diary/starrail.py
new file mode 100644
index 0000000..6c041b0
--- /dev/null
+++ b/simnet/client/components/diary/starrail.py
@@ -0,0 +1,29 @@
+from typing import Optional
+
+from simnet.client.components.diary.base import BaseDiaryClient
+from simnet.models.starrail.diary import StarRailDiary
+from simnet.utils.enum_ import Game
+
+
+class StarrailDiaryClient(BaseDiaryClient):
+    """Starrail diary component."""
+
+    async def get_starrail_diary(
+        self,
+        player_id: Optional[int] = None,
+        *,
+        month: Optional[int] = None,
+        lang: Optional[str] = None,
+    ) -> StarRailDiary:
+        """Get a traveler's diary with earning details for the month.
+
+        Args:
+            player_id (int, optional): The player's ID. Defaults to None.
+            month (int, optional): The month to get the diary for. Defaults to None.
+            lang (str, optional): The language to get the diary in. Defaults to None.
+
+        Returns:
+            Diary: The diary for the month.
+        """
+        data = await self.request_ledger(player_id, game=Game.STARRAIL, month=month, lang=lang)
+        return StarRailDiary(**data)
diff --git a/simnet/client/genshin.py b/simnet/client/genshin.py
index 7466171..88c3b5c 100644
--- a/simnet/client/genshin.py
+++ b/simnet/client/genshin.py
@@ -3,6 +3,7 @@ from typing import Optional
 from simnet.client.components.auth import AuthClient
 from simnet.client.components.chronicle.genshin import GenshinBattleChronicleClient
 from simnet.client.components.daily import DailyRewardClient
+from simnet.client.components.diary.genshin import GenshinDiaryClient
 from simnet.client.components.lab import LabClient
 from simnet.client.components.wish.genshin import GenshinWishClient
 from simnet.utils.enum_ import Game
@@ -13,6 +14,7 @@ __all__ = ("GenshinClient",)
 class GenshinClient(
     GenshinBattleChronicleClient,
     GenshinWishClient,
+    GenshinDiaryClient,
     AuthClient,
     DailyRewardClient,
     LabClient,
diff --git a/simnet/client/genshin.pyi b/simnet/client/genshin.pyi
index fc64423..cc02e2f 100644
--- a/simnet/client/genshin.pyi
+++ b/simnet/client/genshin.pyi
@@ -3,13 +3,16 @@ from typing import Optional
 from simnet.client.components.auth import AuthClient
 from simnet.client.components.chronicle.genshin import GenshinBattleChronicleClient
 from simnet.client.components.daily import DailyRewardClient
+from simnet.client.components.diary.genshin import GenshinDiaryClient
 from simnet.client.components.lab import LabClient
 from simnet.client.components.wish.genshin import GenshinWishClient
 from simnet.utils.enum_ import Region
 from simnet.utils.types import CookieTypes, HeaderTypes, TimeoutTypes
 
 
-class GenshinClient(GenshinBattleChronicleClient, GenshinWishClient, AuthClient, DailyRewardClient, LabClient):
+class GenshinClient(
+    GenshinBattleChronicleClient, GenshinWishClient, GenshinDiaryClient, AuthClient, DailyRewardClient, LabClient
+):
     def __init__(
         self,
         cookies: Optional[CookieTypes] = None,
diff --git a/simnet/client/routes.py b/simnet/client/routes.py
index a4e2a42..1ea68e9 100644
--- a/simnet/client/routes.py
+++ b/simnet/client/routes.py
@@ -23,6 +23,8 @@ __all__ = (
     "REWARD_URL",
     "TAKUMI_URL",
     "CALCULATOR_URL",
+    "DETAIL_LEDGER_URL",
+    "INFO_LEDGER_URL",
     "HK4E_URL",
     "CODE_URL",
 )
@@ -237,6 +239,22 @@ CALCULATOR_URL = InternationalRoute(
     chinese="https://api-takumi.mihoyo.com/event/e20200928calculate/v1/",
 )
 
+DETAIL_LEDGER_URL = InternationalRoute(
+    overseas="https://sg-hk4e-api.hoyolab.com/event/ysledgeros/month_detail",
+    chinese="https://hk4e-api.mihoyo.com/event/ys_ledger/monthDetail",
+)
+
+INFO_LEDGER_URL = GameRoute(
+    overseas=dict(
+        genshin="https://sg-hk4e-api.hoyolab.com/event/ysledgeros/month_info",
+        hkrpg="",
+    ),
+    chinese=dict(
+        genshin="https://hk4e-api.mihoyo.com/event/ys_ledger/monthInfo",
+        hkrpg="https://api-takumi.mihoyo.com/event/srledger/month_info",
+    ),
+)
+
 
 HK4E_URL = Route("https://sg-hk4e-api.hoyoverse.com/common/hk4e_global/")
 
diff --git a/simnet/client/starrail.py b/simnet/client/starrail.py
index 6d42995..7d7690e 100644
--- a/simnet/client/starrail.py
+++ b/simnet/client/starrail.py
@@ -3,6 +3,7 @@ from typing import Optional
 from simnet.client.components.auth import AuthClient
 from simnet.client.components.chronicle.starrail import StarRailBattleChronicleClient
 from simnet.client.components.daily import DailyRewardClient
+from simnet.client.components.diary.starrail import StarrailDiaryClient
 from simnet.client.components.lab import LabClient
 from simnet.client.components.wish.starrail import StarRailWishClient
 from simnet.utils.enum_ import Game
@@ -13,6 +14,7 @@ __all__ = ("StarRailClient",)
 class StarRailClient(
     StarRailBattleChronicleClient,
     StarRailWishClient,
+    StarrailDiaryClient,
     DailyRewardClient,
     AuthClient,
     LabClient,
diff --git a/simnet/client/starrail.pyi b/simnet/client/starrail.pyi
index 3f73ae8..227eada 100644
--- a/simnet/client/starrail.pyi
+++ b/simnet/client/starrail.pyi
@@ -3,13 +3,16 @@ from typing import Optional
 from simnet.client.components.auth import AuthClient
 from simnet.client.components.chronicle.starrail import StarRailBattleChronicleClient
 from simnet.client.components.daily import DailyRewardClient
+from simnet.client.components.diary.starrail import StarrailDiaryClient
 from simnet.client.components.lab import LabClient
 from simnet.client.components.wish.starrail import StarRailWishClient
 from simnet.utils.enum_ import Region
 from simnet.utils.types import CookieTypes, HeaderTypes, TimeoutTypes
 
 
-class StarRailClient(StarRailBattleChronicleClient, StarRailWishClient,DailyRewardClient, AuthClient, LabClient):
+class StarRailClient(
+    StarRailBattleChronicleClient, StarRailWishClient, StarrailDiaryClient, DailyRewardClient, AuthClient, LabClient
+):
     def __init__(
         self,
         cookies: Optional[CookieTypes] = None,
diff --git a/simnet/models/diary.py b/simnet/models/diary.py
new file mode 100644
index 0000000..0c558a8
--- /dev/null
+++ b/simnet/models/diary.py
@@ -0,0 +1,43 @@
+from enum import IntEnum
+
+from pydantic import Field
+
+from simnet.models.base import APIModel
+
+__all__ = (
+    "DiaryType",
+    "BaseDiary",
+)
+
+
+class DiaryType(IntEnum):
+    """Type of diary pages.
+
+    0: Unknown
+    1: Primogems
+    2: Mora
+    """
+
+    UNKNOWN = 0
+
+    PRIMOGEMS = 1
+    """Primogems."""
+
+    MORA = 2
+    """Mora."""
+
+
+class BaseDiary(APIModel):
+    """Base model for diary and diary page.
+
+    Attributes:
+        uid: User ID.
+        server: Server name.
+        nickname: User nickname.
+        month: Month of the diary page.
+    """
+
+    uid: int
+    server: str = Field(alias="region")
+    nickname: str = ""
+    month: int = Field(alias="data_month")
diff --git a/simnet/models/genshin/diary.py b/simnet/models/genshin/diary.py
new file mode 100644
index 0000000..81f468e
--- /dev/null
+++ b/simnet/models/genshin/diary.py
@@ -0,0 +1,113 @@
+from datetime import datetime
+from typing import List
+
+from pydantic import Field
+
+from simnet.models.base import APIModel
+from simnet.models.diary import BaseDiary
+
+__all__ = (
+    "DayDiaryData",
+    "Diary",
+    "DiaryAction",
+    "DiaryActionCategory",
+    "DiaryPage",
+    "MonthDiaryData",
+)
+
+
+class DiaryActionCategory(APIModel):
+    """Diary category for primogems.
+
+    Attributes:
+        id: Category ID.
+        name: Category name.
+        amount: Amount of primogems.
+        percentage: Percentage of primogems.
+    """
+
+    id: int = Field(alias="action_id")
+    name: str = Field(alias="action")
+    amount: int = Field(alias="num")
+    percentage: int = Field(alias="percent")
+
+
+class MonthDiaryData(APIModel):
+    """Diary data for a month.
+
+    Attributes:
+        current_primogems: Current amount of primogems.
+        current_mora: Current amount of mora.
+        last_primogems: Last amount of primogems.
+        last_mora: Last amount of mora.
+        primogems_rate: Primogems rate.
+        mora_rate: Mora rate.
+        categories: List of diary categories.
+    """
+
+    def __init__(self, **data):
+        if data.get("primogem_rate"):
+            data["primogems_rate"] = data.pop("primogem_rate")
+        super().__init__(**data)
+
+    current_primogems: int
+    current_mora: int
+    last_primogems: int
+    last_mora: int
+    primogems_rate: int
+    mora_rate: int
+    categories: List[DiaryActionCategory] = Field(alias="group_by")
+
+
+class DayDiaryData(APIModel):
+    """Diary data for a day.
+
+    Attributes:
+        current_primogems: Current amount of primogems.
+        current_mora: Current amount of mora.
+    """
+
+    current_primogems: int
+    current_mora: int
+
+
+class Diary(BaseDiary):
+    """Traveler's diary.
+
+    Attributes:
+        data: Diary data for a month.
+        day_data: Diary data for a day.
+    """
+
+    data: MonthDiaryData = Field(alias="month_data")
+    day_data: DayDiaryData
+
+    @property
+    def month_data(self) -> MonthDiaryData:
+        return self.data
+
+
+class DiaryAction(APIModel):
+    """Action which earned currency.
+
+    Attributes:
+        action_id: Action ID.
+        action: Action name.
+        time: Time of the action.
+        amount: Amount of the action.
+    """
+
+    action_id: int
+    action: str
+    time: datetime = Field(timezone=8)
+    amount: int = Field(alias="num")
+
+
+class DiaryPage(BaseDiary):
+    """Page of a diary.
+
+    Attributes:
+        actions: List of diary actions.
+    """
+
+    actions: List[DiaryAction] = Field(alias="list")
diff --git a/simnet/models/starrail/diary.py b/simnet/models/starrail/diary.py
new file mode 100644
index 0000000..b949bb3
--- /dev/null
+++ b/simnet/models/starrail/diary.py
@@ -0,0 +1,84 @@
+from typing import List
+
+from pydantic import Field
+
+from simnet.models.base import APIModel
+from simnet.models.diary import BaseDiary
+
+__all__ = (
+    "DiaryActionCategory",
+    "MonthDiaryData",
+    "DayDiaryData",
+    "StarRailDiary",
+)
+
+
+class DiaryActionCategory(APIModel):
+    """Diary category for rails_pass .
+
+    Attributes:
+        id: Category ID.
+        name: Category name.
+        amount: Amount of rails_pass.
+        percentage: Percentage of rails_pass.
+    """
+
+    id: str = Field(alias="action")
+    name: str = Field(alias="action_name")
+    amount: int = Field(alias="num")
+    percentage: int = Field(alias="percent")
+
+
+class MonthDiaryData(APIModel):
+    """Diary data for a month.
+
+    Attributes:
+        current_hcoin: Current amount of hcoin.
+        current_rails_pass: Current amount of rails_pass.
+        last_hcoin: Last amount of hcoin.
+        last_rails_pass: Last amount of rails_pass.
+        hcoin_rate: hcoin rate.
+        rails_rate: rails_pass rate.
+        categories: List of diary categories.
+    """
+
+    current_hcoin: int
+    current_rails_pass: int
+    last_hcoin: int
+    last_rails_pass: int
+    hcoin_rate: int
+    rails_rate: int
+    categories: List[DiaryActionCategory] = Field(alias="group_by")
+
+
+class DayDiaryData(APIModel):
+    """Diary data for a day.
+
+    Attributes:
+        current_hcoin: Current amount of hcoin.
+        current_rails_pass: Current amount of rails_pass.
+        last_hcoin: Last amount of hcoin.
+        last_rails_pass: Last amount of rails_pass.
+    """
+
+    current_hcoin: int
+    current_rails_pass: int
+    last_hcoin: int
+    last_rails_pass: int
+
+
+class StarRailDiary(BaseDiary):
+    """Traveler's diary.
+
+    Attributes:
+        data: Diary data for a month.
+        day_data: Diary data for a day.
+    """
+
+    data: MonthDiaryData = Field(alias="month_data")
+    day_data: DayDiaryData
+
+    @property
+    def month_data(self) -> MonthDiaryData:
+        """Diary data for a month."""
+        return self.data
diff --git a/tests/test_genshin_diary_client.py b/tests/test_genshin_diary_client.py
new file mode 100644
index 0000000..327291e
--- /dev/null
+++ b/tests/test_genshin_diary_client.py
@@ -0,0 +1,31 @@
+from typing import TYPE_CHECKING
+
+import pytest
+import pytest_asyncio
+
+from simnet.client.components.diary.genshin import GenshinDiaryClient
+
+if TYPE_CHECKING:
+    from simnet.client.cookies import Cookies
+    from simnet.utils.enum_ import Region
+
+
+@pytest_asyncio.fixture
+async def diary_client(genshin_player_id: int, account_id: int, region: "Region", cookies: "Cookies"):
+    if genshin_player_id is None:
+        pytest.skip("Test case test_genshin_diary_client skipped: No genshin player id set.")
+    async with GenshinDiaryClient(
+        player_id=genshin_player_id,
+        cookies=cookies,
+        account_id=account_id,
+        region=region,
+    ) as client_instance:
+        yield client_instance
+
+
+@pytest.mark.asyncio
+class TestGenshinDiaryClient:
+    @staticmethod
+    async def test_get_genshin_diary(diary_client: "GenshinDiaryClient"):
+        genshin_diary = await diary_client.get_genshin_diary()
+        assert genshin_diary is not None
diff --git a/tests/test_starrail_diary_client.py b/tests/test_starrail_diary_client.py
new file mode 100644
index 0000000..ec03dac
--- /dev/null
+++ b/tests/test_starrail_diary_client.py
@@ -0,0 +1,31 @@
+from typing import TYPE_CHECKING
+
+import pytest
+import pytest_asyncio
+
+from simnet.client.components.diary.starrail import StarrailDiaryClient
+
+if TYPE_CHECKING:
+    from simnet.client.cookies import Cookies
+    from simnet.utils.enum_ import Region
+
+
+@pytest_asyncio.fixture
+async def diary_client(starrail_player_id: int, account_id: int, region: "Region", cookies: "Cookies"):
+    if starrail_player_id is None:
+        pytest.skip("Test case test_starrail_diary_client skipped: No starrail player id set.")
+    async with StarrailDiaryClient(
+        player_id=starrail_player_id,
+        cookies=cookies,
+        account_id=account_id,
+        region=region,
+    ) as client_instance:
+        yield client_instance
+
+
+@pytest.mark.asyncio
+class TestStarrailDiaryClient:
+    @staticmethod
+    async def test_get_starrail_diary(diary_client: "StarrailDiaryClient"):
+        genshin_diary = await diary_client.get_starrail_diary()
+        assert genshin_diary is not None