Custom Date Range
From AgileApps Support Wiki
You get unlimited versatility with the Custom Date Range option. Parameters include:
Before
Also known as "Ago", this date range includes all data, beginning with the earliest recorded records, and ending with the day/week/month/year specified.
Last
This date range includes dates starting on the specified day/week/month/year, and ending with today.
Next
Beginning today, including all dates through the specified day/week/month/year.