ISOWEEKNUM

Date/Time Functions:
Function: ISOWEEKNUM() - Returns number of the ISO week number of the year for a given date. (ISO-8601).
(E1): 1900-01-01
ISO Week number is: 52
(E2): 1904-02-14
ISO Week number is: 6
(E3): 1936-03-17
ISO Week number is: 12
(E4): 1964-04-29
ISO Week number is: 18
(E5): 1999-05-18
ISO Week number is: 20
(E6): 2000-06-21
ISO Week number is: 25
(E7): 2019-07-04
ISO Week number is: 27
(E8): 2020-08-31
ISO Week number is: 36
(E9): 1956-09-10
ISO Week number is: 37
(E10): 2010-10-10
ISO Week number is: 40
(E11): 1982-11-30
ISO Week number is: 48
(E12): 1960-12-19
ISO Week number is: 51
(E13): 2025-12-06
ISO Week number is: 49