New in Formulas 2.0
The week() function returns an integer (number) between 1 and 53 that corresponds to the ISO week of the year of its date argument.
week(date)
date.week()
Code language: JavaScript (javascript)week() (and its sibling functions minute, hour, date, month, and year) is useful for manipulating dates within Notion formulas.
Example Formulas
week(parseDate("2003-02-01")) /* Output: 5 */
parseDate("2023-08-24").week() /* Output: 34 */
Code language: JavaScript (javascript)