Better support for `W` in days of month

[oltodo]

Hello 👋

I would like to request support for additional day of month using the W flag formats:

• LW: The last working day of the month.
• *W: Every working day of the month.
• x/yW: Every y working day of the month starting on x (e.g. 5/3W).

Supporting these formats will enhance the flexibility and usability of the library for users who need more specific scheduling options.

Thank you for considering this feature request. If you need any further information or clarification, please let me know.

[adhocore]

helo @oltodo thanks for the ticket. i can't promise i have the resource to implement this feature in some sanely reasonable time

[oltodo]

Hi @adhocore
Thank you for your response. I understand that it can be difficult to find the time to implement new features. There is no pressure from my side. I also want to thank you for the time you've already spent on this library; it is very much appreciated.