Date conversion using variable

This might help you:

Specifically this section:

  • Relative to some other anchor date

    • two weeks before Sep 28 2015
      %ICUDateTimeFor%TIME(2015, 9, 28-14)%EEE, MMM d, yyyy%

    • Week 20 of 2016
      %ICUDateTimeFor%TIME(2016, 1, 1+19*7)%EEE, MMM d, yyyy%

    • Six weeks after Apr 20 2016
      %ICUDateTimeFor%TIME(2016, 4, 20+6*7)%EEE, MMM d, yyyy%

I can’t be more specific as I’m a long way from my desk! Anyway - hope it helps.