I have a report that I'd like to have cover data from the beginning to end of the previous full month (i.e. today is January 12, I want the report to cover December 1-31). How can I set this time range? I've figured out how to set the start time (-1mon@mon or 1 month back snap to month) but I can't figure out how to specify the end of last month. The best option I know of is now, and that is not correct for my report.