Just to get as specific as possible:
Experience Dates
Include the start and end dates for each experience. Some Experience Types, such as
Awards, Presentations/Posters and Publications, require only one date. Medical schools
want information about experiences you have begun prior to application submission;
therefore, your start date must be no later than the current month. Similarly, medical
schools ask that the experience end date coincide with the start of medical school; even if
the experience will be ongoing the latest end date must be no later than August of the
current application cycle.
Total Hours
Enter the total number of hours that you completed (or expect to complete) related to this
experience during the date range that you indicated. If this is a repeated experience,
include only the number of hours completed for that specific date range.
So: You cannot put a future activity start date, but you can estimate future hours if you have already started the activity.