Like I said earlier, there's no good euphemism for the Jewish holidays-- unless you want to give several days off and call it "Fall Break." Similarly, if not for the institutions of week-long breaks centered around Christmas and Easter, I'm sure that schools would be obliged to call a spade a spade-- they'd have to call Christmas, Christmas-- just like governments do. I work for the federal government, and get Christmas off. It's listed right there in the Federal calender as Christmas. Why? Because, sadly, I'm too old to get a real "winter/christmas break"