From ca5709e9aa668e54e49d445ae488ab0ec83efa97 Mon Sep 17 00:00:00 2001
From: Arkadii Yakovets <ark@cho.red>
Date: Tue, 15 Oct 2024 18:14:55 -0700
Subject: [PATCH 1/2] Satisfy mypy requirements

---
 .pre-commit-config.yaml     | 2 +-
 holidays/groups/buddhist.py | 2 +-
 holidays/groups/chinese.py  | 4 ++--
 holidays/groups/hindu.py    | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e60438f96..69d4f5068 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -54,7 +54,7 @@ repos:
         exclude: ^(docs)
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.2
+    rev: v1.12.0
     hooks:
       - id: mypy
         additional_dependencies:
diff --git a/holidays/groups/buddhist.py b/holidays/groups/buddhist.py
index c537d0de5..470c29c40 100644
--- a/holidays/groups/buddhist.py
+++ b/holidays/groups/buddhist.py
@@ -26,7 +26,7 @@ def __init__(self, cls=None, show_estimated=False) -> None:
         self._buddhist_calendar_show_estimated = show_estimated
 
     def _add_buddhist_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool]
+        self, name: str, dt_estimated: tuple[Optional[date], bool]
     ) -> Optional[date]:
         """
         Add Buddhist calendar holiday.
diff --git a/holidays/groups/chinese.py b/holidays/groups/chinese.py
index e2f78af62..f513bff1b 100644
--- a/holidays/groups/chinese.py
+++ b/holidays/groups/chinese.py
@@ -48,7 +48,7 @@ def _mid_autumn_festival(self):
         return self._chinese_calendar.mid_autumn_date(self._year)[0]
 
     def _add_chinese_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool], days_delta: int = 0
+        self, name: str, dt_estimated: tuple[Optional[date], bool], days_delta: int = 0
     ) -> Optional[date]:
         """
         Add Chinese calendar holiday.
@@ -59,7 +59,7 @@ def _add_chinese_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        if days_delta != 0:
+        if days_delta and dt is not None:
             dt = _timedelta(dt, days_delta)
 
         return self._add_holiday(
diff --git a/holidays/groups/hindu.py b/holidays/groups/hindu.py
index 933b397e5..f3e8dac7e 100644
--- a/holidays/groups/hindu.py
+++ b/holidays/groups/hindu.py
@@ -26,7 +26,7 @@ def __init__(self, cls=None, show_estimated=False) -> None:
         self._hindu_calendar_show_estimated = show_estimated
 
     def _add_hindu_calendar_holiday(
-        self, name: str, dt_estimated: tuple[date, bool]
+        self, name: str, dt_estimated: tuple[Optional[date], bool]
     ) -> Optional[date]:
         """
         Add Hindu calendar holiday.

From f64af5efc16a85c64d9340ba953c2bde2fb74324 Mon Sep 17 00:00:00 2001
From: Arkadii Yakovets <ark@cho.red>
Date: Tue, 15 Oct 2024 18:36:35 -0700
Subject: [PATCH 2/2] Update code

---
 holidays/groups/buddhist.py | 14 +++++++++-----
 holidays/groups/chinese.py  | 16 ++++++++++------
 holidays/groups/hindu.py    | 14 +++++++++-----
 3 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/holidays/groups/buddhist.py b/holidays/groups/buddhist.py
index 470c29c40..271aa3994 100644
--- a/holidays/groups/buddhist.py
+++ b/holidays/groups/buddhist.py
@@ -37,11 +37,15 @@ def _add_buddhist_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._buddhist_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._buddhist_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_vesak(self, name) -> Optional[date]:
diff --git a/holidays/groups/chinese.py b/holidays/groups/chinese.py
index f513bff1b..95ec1a90f 100644
--- a/holidays/groups/chinese.py
+++ b/holidays/groups/chinese.py
@@ -59,14 +59,18 @@ def _add_chinese_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        if days_delta and dt is not None:
+        if days_delta and dt:
             dt = _timedelta(dt, days_delta)
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._chinese_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._chinese_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_chinese_birthday_of_buddha(self, name) -> Optional[date]:
diff --git a/holidays/groups/hindu.py b/holidays/groups/hindu.py
index f3e8dac7e..c5f8c2f00 100644
--- a/holidays/groups/hindu.py
+++ b/holidays/groups/hindu.py
@@ -37,11 +37,15 @@ def _add_hindu_calendar_holiday(
         estimated_label = getattr(self, "estimated_label", "%s (estimated)")
         dt, is_estimated = dt_estimated
 
-        return self._add_holiday(
-            self.tr(estimated_label) % self.tr(name)
-            if is_estimated and self._hindu_calendar_show_estimated
-            else name,
-            dt,
+        return (
+            self._add_holiday(
+                self.tr(estimated_label) % self.tr(name)
+                if is_estimated and self._hindu_calendar_show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
         )
 
     def _add_diwali(self, name) -> Optional[date]: