Today's the day.

The initial commitment portion of the reverse auction (1000) begins today (March 28, 2016) and I'm very curious to see eventually how much broadcast spectrum gets made available.

Initial commitments must be submitted during a window that will open at 10:00 am Eastern Time (ET) on March 28, 2016, and close, as previously announced, at 6:00 pm ET on March 29, 2016...

A reverse auction applicant must make an initial commitment for each of the stations for which it wishes to become qualified to bid in the clock rounds of the reverse auction.

from: https://www.fcc.gov/document/reverse-auction-initial-commitment-and-tutorial-information