DAY() Formula Not Working For Date Lookup Field

I have a table with a Lookup field that returns a date from a linked record. I’ve confirmed that the Lookup field contains valid date values. The MONTH() and YEAR() formulas work as expected with the Lookup field. But the DAY() formula only returns an “ERROR!” message for each record. Any suggestions?

Hi @Peter_Midgley - yes, getting the same:

This feels like a bug, tbh. Each of these formulas is parsing the lookup date for a different element, so no idea why one won’t work and the others do. Might be worth raising with Airtable support.