Triannual future date

[LaRetta]

I have a StartDate (date) and a Frequency (text) field. I want to calculate the dates of the next upcoming frequencies based upon perspective of today. Weeks, Months, Quarter, Biannual Triannual and Yearly. I know how to get these results but not based upon today. Seems I have to first compare where I am relative to the StartDate.

The current StartDates are several years old and need to stay.

Weekly: start date is 1/7/2000 so Friday. Today is Friday (and can't count) so it should produce 4/27/2012.

Monthly: start date is 1/1/2000 and today is 4/20/2012 so it should produce 5/1/2012.

Triannual: start date is 2/15/2000 the next would be 6/15/2012 (sorry, I had put biannual and I meant triannual)

Quarter: start date is 1/15/2000 the next would be 7/15/2000 since 4/15/2012 has passed

If the date result IS today, it should jump forward to next period. I guess I'm a bit tired. Help through it would be appreciated.

ADDED: BTW, some consider triannual to be an invalid definition so to explain ... triannual means every four months.

Edited April 20, 2012 by LaRetta

[comment]

Hint: when is my next birthday?

[comment]

To be more specific:

WEEKLY =

StartDate + 7 * ( Div ( Get ( CurrentDate ) - StartDate ; 7 ) + 1 )

N-MONTHLY =

Let ( [

today = Get ( CurrentDate ) ;



elapsedMonths = 12 * ( Year ( today ) - Year ( StartDate ) ) + Month ( today ) - Month ( StartDate )

- ( Day ( today ) < Day ( StartDate ) ) ;



elapsedIntervals = Div ( elapsedMonths ; N )

] ;

Date ( Month ( StartDate ) + N * ( elapsedIntervals + 1 ) ; Day ( StartDate ) ; Year ( StartDate ) )

)

[LaRetta]

Your hint did the trick and I performed a forehead slap! My resulting calcs were not as pretty (or efficient) as yours (and those two should DO replace all of mine as well) ...

Thank you!

I never cease to be amazed at your date-function capabilities. LOL. I love the multiplicity of this! What a nice wake-me-up!

Edited April 20, 2012 by LaRetta