Any activity can be made into a floating activity in the Edit or New Activity form by checking the Floating box in the Scheduling section. Select the date that would like your floating activity to start, as well as its range (see below):
Floating activities can be scheduled over the course of days, weeks, months and even years. In the Calendar, floating activities appear on all dates within the floating range selected and are marked by an F:
When you mark a floating activity as complete, the activity will no longer appear in any of the preceding or subsequent dates within the floating range.
Note: Floating activities cannot be created for dates in the past.