Return the week number of the current date


 AB
1=TODAY() = Thursday, January 01, 2026 
2=NOW() = Thursday, January 01, 2026 
3=ISOWEEKNUM((A1)) = 1 
4=TRUNC(((A1-DATE(YEAR(A1), 1, 0))+6)/7) = 1 
5=INT((A1-DATE(YEAR(?-4360), 1, 1))/7)+1 = 6575 

Built-in Functions

TODAY - The date serial number representing today's date.
NOW - The date serial number of the current system date and time.
ISOWEEKNUM - The week number in the year for a given date (based on European convention).

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