I love the idea of receiving flashback emails saying 'x years ago today, you saw...', but 9/10 times I don't see the email until the next day. That's because I get the emails around 18:30 (6:30 pm), and I rarely check my emails in the evening. Because of that I kind of miss the opportunity to look back at the concert on its 'anniversary'.

That's why I would like to be able to enter my timezone in the settings, so the emails can be sent out in the morning (in my timezone). This way I have all day to check my mail and see the flashback email.

I think other people can benefit from this as well, even though it may be a subtle change. And maybe there are other uses for the timezone as well.