DOC: fix ES01,SA01 for pandas.tseries.offsets.CustomBusinessMonthEnd.… (#60775)

DOC: fix ES01,SA01 for pandas.tseries.offsets.CustomBusinessMonthEnd.is_on_offset and pandas.tseries.offsets.CustomBusinessMonthBegin.is_on_offset

Author: tuhinsharma121

ci/code_checks.sh

@@ -146,15 +146,13 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin PR02" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.calendar GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.holidays GL08" \
-        -i "pandas.tseries.offsets.CustomBusinessMonthBegin.is_on_offset SA01" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.m_offset GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.n GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.normalize GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthBegin.weekmask GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd PR02" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd.calendar GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd.holidays GL08" \
-        -i "pandas.tseries.offsets.CustomBusinessMonthEnd.is_on_offset SA01" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd.m_offset GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd.n GL08" \
         -i "pandas.tseries.offsets.CustomBusinessMonthEnd.normalize GL08" \

pandas/_libs/tslibs/offsets.pyx

@@ -720,11 +720,24 @@ cdef class BaseOffset:
         """
         Return boolean whether a timestamp intersects with this frequency.
 
+        This method determines if a given timestamp aligns with the start
+        of a custom business month, as defined by this offset. It accounts
+        for custom rules, such as skipping weekends or other non-business days,
+        and checks whether the provided datetime falls on a valid business day
+        that marks the beginning of the custom business month.
+
         Parameters
         ----------
         dt : datetime.datetime
             Timestamp to check intersections with frequency.
 
+        See Also
+        --------
+        tseries.offsets.CustomBusinessMonthBegin : Represents the start of a custom
+            business month.
+        tseries.offsets.CustomBusinessMonthEnd : Represents the end of a custom
+            business month.
+
         Examples
         --------
         >>> ts = pd.Timestamp(2022, 1, 1)