Mac date formats aren't supported
Created originally on Bitbucket by onyxfish (Christopher Groskopf)
I noticed there were a few things commented out in the code related to this, but it didn't look too close to being functional. I started trying to hack it in myself, but go stymied trying to find a marker I could switch on. It looks like Excel files written on a Mac have a different schema, but I couldn't find a canonical list of such schemas anywhere.
As an aside, I'm surprised you've gotten as far with this project as you have. This data format is really a beast.
Cheers, Chris
Attachments: test.xlsxpatch.diffbasedate_patch_updated.diff