Backport PR #55077 on branch 2.1.x (Revert "BUG: Timestamp origin takes no effect in resample for 'MS' frequency (#53938)")
Backport PR #55077: Revert "BUG: Timestamp origin takes no effect in resample for 'MS' frequency (#53938)"
Mind fixing up the failures here @MarcoGorelli? yup, thanks for the ping! 🤔 I'm confused, if I look at https://github.com/meeseeksmachine/pandas/tree/auto-backport-of-pr-55077-on-2.1.x I can see a commit I've added, but here I can't see it

might just be github playing up, will check again later thanks @lithomas1 for fixing up