This happened at the end of August but I missed it at the time. It came up again recently as a topic in the Vienna mayoral elections, in which Heinz-Christian Strache, the leader of Austria's leading
"MA 10 [the nursery school in Vienna] cares for and supports children of various religions. For that reason the religious content of traditional festivals is omitted. You did not comply with this and several times in the overall group you explained the meaning of the Christian Christmas festival to the children."Source
To this she answered:
"I only answered the children's questions about Christ and the Christ child. I am a Christian but not a religious teacher."