I totally agree with Families (though oddly, not so much with filee, who is being a touch disingenuous. To say the most important religious event in the Christian calendar isn't about God is a little bit silly. If the school wanted to have a Winter Celebration, or a Spring Celebration, perhaps alongside Christmas and Easter, then fair enough. But if they're talking about Christmas and Easter, I would expect the children to hear the religious stories relating to those events, similar to when they learned about Eid and Chanukah. If the school don't want to do that, then rebrand.)
Aside from that, I wonder how easy it is to avoid hearing any religious references in everyday life? I don't know, because I am religious, my children go to religious school and to church and so it's hard for me to work out how much would be left if those things weren't there. I just take it all for granted.
A massive amount of the content of the National Gallery has a religious content, for example. There are crucifixes for sale in most shops. You might be watching TV when a funeral or church wedding or baptism are shown. They sing about God before each England Football game (and my word that's a depressing hymn on a number of different levels). If Wales are playing too, then you often get Bread of Heaven (sung gloriously).
So anyway, I'm just trying to imagine a completely religion-less world. I wonder if anyone here has managed it, because I'd find it fascinating how you deal with it all. I have many non-religious friends, who usually just tell the story, but present it as myth, and discuss it in terms of 'this is what Christians believe'. To me that makes perfect sense, but is there anyone out there who attempts to avoid the references completely?