With these gadgets you can select how long before the event REMINDERCHECK starts reminding you about it, and how long after the event REMINDERCHECK should still remind about it, if you haven't acknowledged the event before that.
0=Before
accepts any value from 1 to 365, defining how many days
before the event REMINDERCHECK should start reminding. Leaving the gadget
empty means that reminding should start on the day the event is due.
0=After
accepts any value from 1 to 365, defining how many days
after the event REMINDERCHECK should still remind about it if the event has
not been acknowledged. Leaving the gadget empty means that reminding
should stop after the day the event is due.