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I see a couple of solutions. The simplest is to:

1. Find the offset from your desired First-day-of-week, in days, for
the first day of the target year from the the first day of Week1 *

wOffset = %diff(FirstDateOfTargetYear: wTestDate: *days);
wOffset = %rem(wOffset: 7);

*
2. multiply the week# by 7; that gives you the Julian Date for that
particular week.
3. Subtract the offset from the Julian Date *First-Date-of-week* =
JulianDate - %days(wOffset);

I have not tested this; it is pretty likely in need of some tuning. wTestDate is any fixed first day of the week of Week 1in a past year, whether a Sunday, Saturday, whatever. Your choice.


On 11/26/2014 8:52 AM, Brian wrote:
Hello All,

I have the need to get the date of the first day of the week based on a
week number. I've looked thorough lots of date functions and can't seem to
see a way to get the date of the first day of the week for a particular
week number. Maybe I need a multi-step process, but I am just struggling
to see it.

The date can be based off Sunday or whatever arbitrary day could be
considered as the first day of the week, if that helps.

The data is planning data so I really just need to show it as a quantity
along with a date, but the date needs derived from a week number.

As an example, if I had week number of 1, the date might be 12/29/2014,
week 2 would give me 1/5/2015 and so on.

Can anyone provide some suggestions on a method to get to a date based off
the week number?

Thank you.


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