The most popular form of Zantedeschia, aethiopica, the large white one, is commonly known as the Easter lily.
Easter is when they are supposed to flower - in April.
I have some of those growing in containers. I simply move the containers into a frost free place during the worst of the Winter, and move them outside March time. We can still get frosts during April.
You can find novelty coloured varieties in garden centres, which are in flower now. I don't know much about those, how they should be cared for, or when they naturally flower.