add payment holiday

docs/source/modeling.rst

@@ -653,8 +653,8 @@ Examples:
      ["DayOfMonth",10], # every 10th of month after first pay date or next pay date
 
 
-Custom Defined Dates
-^^^^^^^^^^^^^^^^^^^^^
+Custom Defined Dates(for payment holiday)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 User are free to feed in a series of custom defined pool collection date / bond payment dates to accomodate holidays etc.
 
 .. code-block:: python
@@ -665,6 +665,9 @@ User are free to feed in a series of custom defined pool collection date / bond
    ,"closing":"2023-01-01"}
 
 
+.. note::
+  User can generate a series of dates on his/her own and nudge the dates before/afterwards base on the holidays which are generated by `python-holidays <https://python-holidays.readthedocs.io/en/latest/>`_
+
 Deal Status 
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