FlexibleDateJumpGen jumps the referenced date by n number of Days/Months/Years etc.

Sample Scenario: 

Let's suppose there are 2 attributes, startDate and endDt and you want endDt to be n number of days apart for every startDate, Have one variable generate a random number of days (or use constant), then in endDt Attribute's FlexibleDateJumpGen, refer to startDate and add reference of Attribute 'randomNumber' in  jumpAmount which will give you follow result.

randomNO(RandomGen)startDate (FlexibleDateRangeGen)endDate (FlexibleDateJumpGen)