Week Number from Date
Calculates the week number from a date. Week numbers are supported in both the U.S. and ISO formats.
・The ISO method defines the 1st week of the year as the week containing the first Thursday. It is primarily used in Europe.
・The USA method defines the 1st week of the year as the week containing January 1.
• The Saturday-start week is primarily used in Middle Eastern countries.
• The pop-up calendar is available for dates on or after 1582-10-15, when the Gregorian calendar was adopted.
・The USA method defines the 1st week of the year as the week containing January 1.
• The Saturday-start week is primarily used in Middle Eastern countries.
• The pop-up calendar is available for dates on or after 1582-10-15, when the Gregorian calendar was adopted.
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