Compression of Tree Folder directory

Hello, I am not a programmer nor I know about programming, so far. I have the following directory tree:

work/documents/Client_01/year 2018/January/PO_0001/
work/documents/Client_01/year 2018/February/PO_0002/
work/documents/Client_01/year 2018/December/PO_0092/
work/documents/Client_02/year 2019/January/PO_0001/
work/documents/Client_02/year 2019/February/PO_0002/
work/documents/Client_01/year 2019/November/PO_0012/
work/documents/Client_01/year 2019/November/PO_0032/
work/documents/Client_99/year 2020/January/PO_0001/
work/documents/Client_99/year 2020/February/PO_0002/
work/documents/Client_99/year 2020/March/PO_0005/
work/documents/Client_99/year 2020/April/PO_0031/

Im interested in the named as months. I want to compress all the content inside the folders that are named January, February, March, etc from of all my client's folders in Windows 10 with Winrar or 7zip. Can you help me?