The FCC's 28 GHz auction will take a a long holiday break strating Dec. 21. That's if it is still going on by then. 

As of round 66, the 5G spectrum auction had collected $685,220,210 in provisionally winning bids for 2,927 licenses, which was only $169,670 more in bids than round 65, the smallest incrase since the bidding began Nov. 14. 

The FCC says that "if the auction is still going on, bidding will be suspended early in the afternoon Friday, Dec. 21, and that if it is still on a four-round-per-day schedule, that will be at 1 p.m., which means after round two of that day, and won't resume until Jan. 3 at 10 a.m.

Asked in a C-SPAN interview for its Communicators Series about the auction's relatively low bid total compared to, say, the broadcast incentive forward auction total of $19 billion, and what that said about the appetite for that high-band spectrum, the chairman would only say that "different spectrum bands have different properties to them, saying some may be better for coverage, some may be more perfect for capacity and that sometimes drives market interest in a different way." He said those different technical characteristics are something that every body generally takes into account.