DOC: Add SA01 ES01 for pandas.Timestamp.is_leap_year

ci/code_checks.sh

@@ -260,7 +260,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Timestamp.fromordinal SA01" \
         -i "pandas.Timestamp.fromtimestamp PR01,SA01" \
         -i "pandas.Timestamp.hour GL08" \
-        -i "pandas.Timestamp.is_leap_year SA01" \
         -i "pandas.Timestamp.isocalendar SA01" \
         -i "pandas.Timestamp.isoweekday SA01" \
         -i "pandas.Timestamp.max PR02" \

pandas/_libs/tslibs/timestamps.pyx

@@ -820,9 +820,20 @@ cdef class _Timestamp(ABCTimestamp):
         """
         Return True if year is a leap year.
 
+        A leap year is a year, which has 366 days (instead of 365) including 29th of
+        February as an intercalary day. Leap years are years which are multiples of
+        four with the exception of years divisible by 100 but not by 400.
+
         Returns
         -------
         bool
+            True if year is a leap year, else False
+
+        See Also
+        --------
+        Period.is_leap_year : Return True if the period’s year is in a leap year.
+        DatetimeIndex.is_leap_year : Boolean indicator if the date belongs to a
+            leap year.
 
         Examples
         --------