DOC: improve Timestamp properties docstrings (#50619)

Author: abonte

pandas/_libs/tslibs/timestamps.pyx

@@ -579,7 +579,16 @@ cdef class _Timestamp(ABCTimestamp):
     @property
     def is_month_start(self) -> bool:
         """
-        Return True if date is first day of month.
+        Check if the date is the first day of the month.
+
+        Returns
+        -------
+        bool
+            True if the date is the first day of the month.
+
+        See Also
+        --------
+        Timestamp.is_month_end : Similar property indicating the last day of the month.
 
         Examples
         --------
@@ -596,7 +605,16 @@ cdef class _Timestamp(ABCTimestamp):
     @property
     def is_month_end(self) -> bool:
         """
-        Return True if date is last day of month.
+        Check if the date is the last day of the month.
+
+        Returns
+        -------
+        bool
+            True if the date is the last day of the month.
+
+        See Also
+        --------
+        Timestamp.is_month_start : Similar property indicating month start.
 
         Examples
         --------
@@ -613,7 +631,17 @@ cdef class _Timestamp(ABCTimestamp):
     @property
     def is_quarter_start(self) -> bool:
         """
-        Return True if date is first day of the quarter.
+        Check if the date is the first day of the quarter.
+
+        Returns
+        -------
+        bool
+            True if date is first day of the quarter.
+
+        See Also
+        --------
+        Timestamp.is_quarter_end : Similar property indicating the quarter end.
+        Timestamp.quarter : Return the quarter of the date.
 
         Examples
         --------
@@ -630,7 +658,17 @@ cdef class _Timestamp(ABCTimestamp):
     @property
     def is_quarter_end(self) -> bool:
         """
-        Return True if date is last day of the quarter.
+        Check if date is last day of the quarter.
+
+        Returns
+        -------
+        bool
+            True if date is last day of the quarter.
+
+        See Also
+        --------
+        Timestamp.is_quarter_start : Similar property indicating the quarter start.
+        Timestamp.quarter : Return the quarter of the date.
 
         Examples
         --------