Future Timeline

https://www.futureme.org/

You can send messages to your future self e.g. email yourself a message 1 month from now.

I sent my future self my password to access my FIVR fantasy's folder.

I posted about this in the previous forum. Sent myself a message that's due to arrive later this year. And I'll be sending more in future years.

Google Calendar reminders accomplish the same thing.