DeletedUser16026
A new quest becomes available on a daily basis (every 24 hours). They do stack up, so if you have not completed the previous one you will receive the new one after you complete the previous one. But completing the previous one does not automatically give you a new one, you still have to wait for the new day. Hopefully that's not too spoiler-ish but gives enough information of how they run.
I'm sure most, if not all, of the questions will be answered just by looking at the event once it starts.
I'm sure most, if not all, of the questions will be answered just by looking at the event once it starts.