what is this?

Last year, I had one winter blooming flower in my front yard. Now I have a small colony, surviving snow and frigidness. 

Someone called it an evening primrose but according to Wikipedia, that would open only at the close of day. Mine opens all day, everyday.

I believe someone else called it a wood rose. Is that what this is?

By whatever name, it is sweet. It is my own, personal miracle that appears in January and persists.

As must we all.