week

From a date/time object, determines the week number within
the year. An integer in the range 1-53; the ordinal of the
week, within the year.

week(date) → returns numeric

date.week()

Argument Reference

A date/time object in the range 100 AD-9999 AD.

CF2016u8+ Indicates whether the week starts on Sunday (gregorian) or Monday (iso)

Values:

Member function is available in CF11+.

Member function is available in Lucee4.5+.

dt = createdatetime(2016,1,1,5,30,25);
w = week( dt );
writeoutput( w );

Expected Result: 1