Tbh, I think it's all relative to which market you're catering to, how big your client base it, coupled with what your targets how/what you class as busy.
I went into this month with no bookings from any of my UK clients which was expected given travel to US was about to open up and knew they would be headed out there. However, several US clients have resurfaced, and I have been busy enough already this month that I do not have to worry about how the rest of this month pans out.