[Raphmedia]

If you have a bad memory, you should look into mail reminder services. You write something you want to be reminded of and they send you an email about it later on.

Or simply a Google Calendar event.

[pavel_lishin]

Yeah, I ended up adding a Google Keep entry.

This definitely seems like the case where collecting email would be appropriate - "Enter your email here to be reminded on the 28th", etc.