Add whatsnew

Author: rhstanton

doc/source/whatsnew/v0.25.2.rst

@@ -102,6 +102,9 @@ Other
 - Compatibility with Python 3.8 in :meth:`DataFrame.query` (:issue:`27261`)
 - Fix to ensure that tab-completion in an IPython console does not raise
   warnings for deprecated attributes (:issue:`27900`).
+- Fix :class:`AbstractHolidayCalendar` to return correct results for
+  years after 2030 (now goes up to 2200) (:issue:`27790`)
+
 
 .. _whatsnew_0.252.contributors: