Mainly I want a continuous calendar. Just a table of weeks. My thought is to tie calendar with e-mail (what a novel idea) and todo list. I would like to enter new events just writing down with some kind of simple language and auto-completion. I feel that most calendars have too much friction comparing to paper calendar.
Todos should jump to the next day until they are done or deadline is met.
I would like to tie it with e-mail so I could pin the e-mail to specific day or to a todo item as described in previous paragraph. It would be a calendar first and e-mail second.
I wanted at first have it running as a server on a tablet that I would stick to the fridge. It would only need a thin proxy, but thanks to Let's Encrypt it would run with end to end encryption. Also running SMTP server on a tablet. But it is a bit too complicated to do at first.