Hi,

Please find my attached patch which implements a way to capture entries
grouped by month.

I was searching for this option, but only found a way to group entries by
week or day.

I found the following posts where other people also need this feature:
https://emacs.stackexchange.com/questions/48414/monthly-date-tree
https://lists.gnu.org/archive/html/emacs-orgmode/2018-02/msg00092.html

Regards,
Jason Dunsmore