To organize an event, it is often necessary to poll a group of people about possible dates. This problem is solved by Doodle (https://doodle.com/), but I'd like to see this as a proton-native operation.

Specifically, a poll could look like this: You click on a separate "Event Poll" action button under "New Event", enter the addresses of people you'd like to participate in the event, and select some date options. The invited people get emails with a link to a page where they can vote for specific times. All date options show up in your calander with a dashed frame, indicating that scheduling is tentative. Each event also shows the current rank in the poll.

To get this right, I'd also suggest that the voting system is a quadratic vote (https://en.wikipedia.org/wiki/Quadratic_voting). This allows invited people to downvote certain dates or express their preferences in a more nuanced way than just "yes/no/maybe".