My cards say "Happy Holidays" because I send them to a number of denominations. If I know their denomination and what they celebrate, I handwrite appropriately. To my sister, who is non-practicing Jewish, I wrote "Happy WinterHoliday, have some awesome Chinese food on the 25th!" (their yearly "Christmas" tradition LOL).
There are extremists everywhere, I guess. I just ignore them.
There are extremists everywhere, I guess. I just ignore them.
If you KNOW someone celebrates something besides Christmas (or doesn't celebrate anything at all) then by all means take that into account.