Email Reminder?

Is it possible to add an email reminder function? For example to receive an email reminder 1 or 2 hours (user's choice) before the event?

It's possible, but not easy.
Would you want evry registered user to be reminded of all events? Or let a user choose what events they want to be reminded of?

In the second case, an additional db table to map user id's and events to be reminded of. In both cases, you would need to add a process periodically to scan the event table, then look up who wants to be reminded of the next event(s), and sent them an email. This process would run outside of the web browser, so you need access to a server that can query the database and send emails. There is no cron function in PHP

It is outside the scope of the current calendar's intended function as an Event calendar. LTW calendar is not a scheduler calendar.

Thanks for the response. I understand now the difficulty of it.