Hey, @Tutanota, could we have custom time periods for event reminders, please?

I'd really love to get a reminder exactly 2.5 hours before an event, but currently, I can only choose between 30 minutes, 1 hour and 1 day. Also, the earliest reminder is 1 week before the event, so there's no way to have #Tutanota remind me a couple weeks before someone's birthday to buy a present…

Allowing a custom number before the noun shouldn't be too hard, I think ¯\_(ツ)_/¯