2 and a half questions : Automaticaly moving new item to a specific group (Months)

I use a board for my yearly event calendar. My groups are my month. When I send a form to an organizer to create a new event (works well).

My first situation :
I would like to have a date column where you can chose more than one date but not consecutive dates. (13th april, 24th april, 5 june). Is it possible as a date column and could it be sent as a form question for the organizer to give a few options for an event.

My second situation :
When the item is created, can it be automatically moved to the group corresponding to the date he chose ? Let’s say he chose the 24th of april, can it automatically moved to my April group ?

Thanks !!