DAY_OF_YEAR

Returns day of year of the provided date as an integer constant in the range 1-366

DAY_OF_YEAR (date)

Can be used in the condition of a FIND action.

Attribute of the Date type or date constant or calculation producing a date

Number: the day of the year of the date (1-366)

IF DAY_OF_YEAR (Account.OpeningDate) = 250 THEN ...