I have two different calendars. I want both of them to get reminders, but I want one to give me reminders a day in advance and the other to give me reminders an hour in advance. I know I can just manually change the time each time I add something to the calendar, but I'd rather Thunderbird do it automatically since I always want the same period for each calendar. Is there a default way to do this? If not, is there an addon that does this? Thanks.