Hey @zack good question! At this time there is not a way to close out the specific days, etc. However, what you could do here would be to just use the last day of the month for the automation. What I think makes the most sense is to set the date for Dec 31st, so if that date has passed, you know the entire month has passed.
Do you think this works as a workaround? I know we are looking into adding a “Month” column moving forward but unfortunately do not have any relative timeline on it!