No, no I meant you haven't had the experience of not celebrating Christmas in a Christian society.
This is probably not quite the same but actually there's one public holiday I don't care too much about. It's the midsummer fest. Originally a pagan celebration, it was later Christianized, but I don't think meny people think about that Christian side of that weekend. (At least I don't.) For many people it's just a three-day weekend during which you drink a lot and go to your cottage on the shore of a lake if you have one. My family doesn't have a cottage so in that sense it isn't special.
Yep, it's a good weekend for socializing but there are many other good weekends in the summer anyway. As a lazy guy, I usually dedicate that weekend's evenings every second summer only for watching football Euro or World Cup.
Still, as it's a puclic holiday on Friday, I like it. Not that it really has affected on me very much but once I'll get a permanent job, for sure I want that public holiday to stay. And of course, it will stay.