I use Rainlander a lot for daily and weekly reminders (like exercises, pauses, TV programs etc.). The alarms are only valid at a specific time or time frame.
But when I do not use my PC for some time, I get all these overdue alarms. And I have to cancel them one by one.
I would like to have an check box: [do not remind past alarm time or end time]
What ever is latest. So you could set an alarm 15 minutes before and still be reminded till the end time of the event, but not after that.