I’m having trouble adding holiday by name. Country selected is US. I tried adding Christmas too just to test and getting the same error message. Am I missing something?
In the python holiday library, for most US states, they’re called “Washington’s Birthday” and “Christmas Day”. You can use “washington” and “christmas” as partials for removal (though some states have multiple holidays that include “christmas” in their name, so YMMV).
Adding require a “YYYY-MM-DD”, names and partials will not work. I think the theory is that a named holiday for a given locale would never need to be added because it’s already in part of the holidays library…
Thanks for the pointer. “Washington’s Birthday” didn’t work but just adding “washington” did.