...
The 'Date Window' checks whether the value of one date field falls within the range (window) of another date field. Note, the date checking is only one-way, i.e. it only looks forwards, not backwards. If the validation check fails, the transition no action will not be completedperformed.
Configuration
You must select the two date fields and the window period, when configuring the transition. For example:
...
A workflow is configured so that the 'Close' transition has the 'Date Window' check. The 'Resolved Date' is checked using a window of 5 days with respect to the 'Created Date'. If a user attempts to resolve an issue on this workflow, where the 'Resolved Date' is more than 5 days after the 'Created Date', the check will fail and the transition action will not be completed.
Supported Field Types
...