Springtime flowers

I see these flowers blooming briefly every year in early spring. There is one spot in particular where there is almost a carpet of them, a shady place beneath some tall trees. But this year I'm seeing them in the vineyard, out in the sunny spots under the vine trunks. I haven't tried to identify them yet, so I don't know anything about them.

Anybody recognize these? UPDATE: It's Star of Bethlehem, Ornithogalum umbellatum.

Last night was crystal clear, and this morning is cold, but brilliantly sunny. Time to bundle up and go out with Callie!