FIRSTDATE doesn't work as expected

I created a simple measure = FIRSTDATE(Table[column].[Date]). In this column the first date is 2023-12-04, but when I put in the visual Card, it shows 2023-01-01. I having seen some people with problems using this function and others by helping improving formulas, however no one answer why doesn't work as expected?

PS.: I am not english native speaker, any doubt just ask.