Can I email DS's teacher during half term? I've just sorted some hospital and orthodontist appointments and it would be quite practical to just do it now. He will miss the first morning back, so emailing Monday morning seems quite rude, and I will be driving to the appointment during the window when they accept calls in the morning.
However, it also seems a bit rude to email during the holidays. But neither is it better to email on Sunday evening? Or do I assume that they won't read emails until it's convenient and just email now?