Re: Get Start Date of a Week Number

On Wed, Nov 26, 2014 at 9:52 AM, Brian <belstsrv@xxxxxxxxx> wrote:

I have the need to get the date of the first day of the week based on a
week number.

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

I think you need to be more clear. Are we talking about ISO week
numbers (see John E's link)? Or do *you* choose which day of the
week? Or is that something that is given to you? Or are you given a
start date?

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.

Where does the 12/29/2014 come from? Is that input? Could you be
given any arbitrary date as input?

If you're not talking ISO, and you get *two* pieces of input, and
those two pieces are (1) a start date and (2) the week number, then
you can simply add the required multiple of 7 days. Taking your
example, where startDate is d'2014-12-29' and weekNumber is 2:

newDate = startDate + %days(7 * (weekNumber - 1))

But your requirements may be different. I'll wait until you clarify
before offering more.

John Y.

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

Thank you.
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