C-Span says the trial begins today, at 12:00 Noon (ET), with the swearing of Chief Justice Roberts & the Senators.
The Hill says Roberts is sworn in at 2:00PM — who swears in the Chief Justice? https://thehill.com/homenews/senate/478496-mcconnell-locks-in-schedule-for-start-of-impeachment-trial
the second order of business will be the recusal of all four Democrat Presidential candidates that can not possibly render a fair verdict on the impeachment of President Trunp
Per Sen Marsha Blackburn on Fox and Friends