Backyard tree

I come home one May (5/3) afternoon and was amazed by this sight.

We've been living in this house for 5 years and I don't remember this tree looking like this - I probably spend so little time outdoors and so little time looking at my surroundings that I have been missing out on this beautiful sight all this time.

I wonder what kind of tree this is ? The foliage turns green eventually.

My photos don't do it justice.

It really is beautiful.