You can create a 24/7 calendar to assign to tasks which should be calculated on elapsed or continuous time.

To do this:

  1. Add a new calendar in Navigator > Calendars.
  2. Right click on any Saturday and select Normal Working Day > Every Saturday.
  3. Repeat step 2 for any Sunday.
  4. Right click on any day and select Edit Day Type.
  5. Set the start time to 00:00 and the end time to 24:00.
  6. Change the day description to 24 hour day.

    Tasks assigned this calendar will be scheduled on a continuous calendar. A duration of 1d will be calculated as 24 hours elapsed time.