EOMONTH

Date/Time Functions:
Function: EOMONTH() - Returns the serial number for the last day of the month that is the indicated number of months before or after start_date.
2020-01-01 and -12 months is 43496 (2019-01-31)
2020-01-01 and -11 months is 43524 (2019-02-28)
2020-01-01 and -10 months is 43555 (2019-03-31)
2020-01-01 and -9 months is 43585 (2019-04-30)
2020-01-01 and -8 months is 43616 (2019-05-31)
2020-01-01 and -7 months is 43646 (2019-06-30)
2020-01-01 and -6 months is 43677 (2019-07-31)
2020-01-01 and -5 months is 43708 (2019-08-31)
2020-01-01 and -4 months is 43738 (2019-09-30)
2020-01-01 and -3 months is 43769 (2019-10-31)
2020-01-01 and -2 months is 43799 (2019-11-30)
2020-01-01 and -1 months is 43830 (2019-12-31)
2020-01-01 and 0 months is 43861 (2020-01-31)
2020-01-01 and 1 months is 43890 (2020-02-29)
2020-01-01 and 2 months is 43921 (2020-03-31)
2020-01-01 and 3 months is 43951 (2020-04-30)
2020-01-01 and 4 months is 43982 (2020-05-31)
2020-01-01 and 5 months is 44012 (2020-06-30)
2020-01-01 and 6 months is 44043 (2020-07-31)
2020-01-01 and 7 months is 44074 (2020-08-31)
2020-01-01 and 8 months is 44104 (2020-09-30)
2020-01-01 and 9 months is 44135 (2020-10-31)
2020-01-01 and 10 months is 44165 (2020-11-30)
2020-01-01 and 11 months is 44196 (2020-12-31)
2020-01-01 and 12 months is 44227 (2021-01-31)