Due to COVID-19, I find myself rescheduling things to a year or more. Some are events (for example, a conference) and some could be things I just hope to be able to do next year at this time.

The problem is that I'm finding that a lot of tasks end up being rescheduled for the same time. It would be nice to tell RTM that a certain date (or range of dates) are booked so that I don't schedule a lot of items for that time. So, for example, I could set up 21 June 2021 - 28 June 2021 as a vacation week and I would get warned when I tried to reschedule my "Get car in for service" for that date.