Date.AddWeeks(dateTime as any, numberOfWeeks as number) as any
datetimezone result from adding
numberOfWeeks weeks to the
datetimezonevalue to which weeks are being added.
numberOfWeeks: The number of weeks to add.
Add 2 weeks to the
datetimezone value representing the date 5/14/2011.
Date.AddWeeks(#date(2011, 5, 14), 2)
#date(2011, 5, 28)