I think C-Span said 3 EST for the parade, but the font was tiny, so I could be wrong. The Chicago Sun Times shows the parade beginning at 1:00, and CNN shows 1:30. Yesterday I read it was to begin at 2:00 (don't recall the source) so my guess is sometime after 2:15/2:30 since they began lunch a little late.
Crowds are gathering and foxnews just reported they see no protestors, yet.