Today Anchors Families Matching Christmas Pajamas

Today means the current day, so if you're asking what day of the week it is, it can only be in present tense, since it's still that day for the whole 24 hours. In other contexts, it's okay to say,. I think it is a good question.

Yes, idiom, but i actually do like. No, as of can mean both - 1) as of today, only three survivors have been found. 2) as of today, all passengers must check their luggage before boarding the plane.