==DATE(year,month,day)
=DATE(1999,1,1)
The function is used to create a date from separate year, month, and day values, and returns the date of January 1, 1999.
=DATE(A1,4,15)
It can also be used to create dates from cell references. This example, returns the date of April 15, 2018.
=COUNTIF(range,">"&DATE(A1,B1,C1))
The function can also be used to count dates greater than a certain date in a worksheet. This example, counts dates greater than January 1, 2019 in a worksheet where A1, B1, and C1 contain year, month, and day values.
=DATE(YEAR(TODAY()),1,1)
The function can be combined with other functions to return the first day of the current year, and returns the first day of the current year.
The DATE function in Sourcetable allows users to turn three numbers into a date, returned as a serial number that represents the date in the 1900 date system.