some new features

.venv/lib/python3.12/site-packages/holidays/groups/eastern.py

@@ -0,0 +1,51 @@
+#  holidays
+#  --------
+#  A fast, efficient Python library for generating country, province and state
+#  specific sets of holidays on the fly. It aims to make determining whether a
+#  specific date is a holiday as fast and flexible as possible.
+#
+#  Authors: Vacanza Team and individual contributors (see CONTRIBUTORS file)
+#           dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
+#           ryanss <ryanssdev@icloud.com> (c) 2014-2017
+#  Website: https://github.com/vacanza/holidays
+#  License: MIT (see LICENSE file)
+
+from datetime import date
+from typing import Optional
+
+from holidays.calendars.gregorian import _timedelta
+
+
+class EasternCalendarHolidays:
+    """
+    Eastern calendar holidays base class.
+    """
+
+    def _add_eastern_calendar_holiday(
+        self,
+        name: str,
+        dt_estimated: tuple[Optional[date], bool],
+        show_estimated: bool = True,
+        days_delta: int = 0,
+    ) -> Optional[date]:
+        """
+        Add Eastern (Buddhist, Chinese, Hindu, Islamic, Mongolian) calendar holiday.
+
+        Adds customizable estimation label to holiday name if holiday date is an estimation.
+        """
+        estimated_label = getattr(self, "estimated_label", "%s (estimated)")
+        dt, is_estimated = dt_estimated
+
+        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 show_estimated
+                else name,
+                dt,
+            )
+            if dt
+            else None
+        )