We should be able to tell a user that he/she is not allowed to create a meeting earlier than we do today (which is when the user has filled the form and hit 'Add').
First part is in as part of: https://github.com/fedora-infra/fedocal/commit/3deef438f6beab5830a3a295d4ea677ef511f562
Second part is in progress: https://github.com/fedora-infra/fedocal/pull/8
And it's in :)
to comment on this ticket.