These young cherry trees near our apartment blossomed early, catching the last snow of the winter in late March:
We visited the Tidal Basin that weekend to see if the DC blossoms had started, but there were only buds.
I returned a week and a half later to find the blossoms at their peak. It was Wednesday evening at sunset.
We returned again that weekend after church to see the last of the blossoms; already many had lost their petals and green leaves were gradually replacing the pink flowers, but there were still many trees in full bloom.
Full Cherry Blossom 2013 photoset here, and I have an unbroken collection of cherry blossom photosets going back to 2004.