YEAR() operator returns the year portion of its DATE or DATETIME operand.
YEAR() returns all four digits of the year value - 2020, not 20.
This example program shows how the YEAR() operator can be used:
MAIN
DEFINE my_date DATE
LET my_date = TODAY
DISPLAY "Today is ", my_date
DISPLAY "Day: ", trim(DAY(my_date))
DISPLAY "Month: ", trim(MONTH(my_date))
DISPLAY "Year: ", trim(YEAR(my_date))
END MAIN
The example programs, year and year_md, show how to get both 2- and 4-digit number of the year.