Last Log Date (Search=>Filter=>Dates)
Use these fields to select waypoints based on the date that of the last log for that waypoint. This date is only meaningful if you load GPX files that contain logs. By default, all waypoints are selected (on or before to today's date). Use the drop-down menu to select other date options. The second field allows you to choose the date to apply: the default is today's date. Click on the calendar icon
to display a calendar, or type a date directly into the field in the format of your system's date setting. GSAK displays a second calendar field if you choose "Between (inclusive)" on the drop-down menu.If you want to compare relative dates rather than absolute dates, then use the during options. For example, "Show me caches with a log in the last 7 days"
If you want to compare to another date use the Compared to option.