We have Interactive Filters that allow you to based on a set date range, such as 'Last Quarter' or 'This Week'.
1. Date Ranges can be found by going to the '+' button in the top right of a dashboard you own or can edit.
2. From the '+' menu, select 'Interactive Filters', then 'Date.' These will work with cases or task reports.
3. If you would like to provide your customers with more configurable date ranges, you can go to 'Custom Interactive Filters' in the Widget selector (from the '+' icon) and select one of the 3 options there. There is one specifically for Opened dates, one specifically for Closed dates, and one that provides Open, Closed, or Updated options. This filter will allow you select specific dates or date ranges with more granularity than the standard 'Interactive Filters'. These only work on case reports.
If you still have questions or need additional assistance, please use the 'Contact ServiceNow Team' form.