Filter current year and previous year

Question

DateTimeFormat([DoB],"%Y") = 
DateTimeFormat(DateTimeNow(),"%Y") or DateTimeFormat([DoB],"%Y") = 
(tonumber(DateTimeFormat(DateTimeToday(),"%Y"))-1)

Hey guys I am trying to filter the DoB column based on current year and last year. I am getting an error invalid type in  operator ==

Qiu · Accepted Answer

@Ultralightbeam

Just as @clmc9601 pointed out, we need to change it back to string after the numeric calculation for the latter creteria.