Idea by @You_Fool and myself.
The current set-up is to join the next round while the current round is still under way, and the round starts within a day of the former round ending.
To create a bit of a breathing break in between the rounds, and have some time to align people in the families, set up starting strategy and role structure etc. We have the following suggestion:
Start the round on the 1st of every month.
End the round 2 days before the last day of the month.
This would mean round length may differ 1 or 2 days depending on the month, but would give a consistent break between rounds.