WBBM-WCFS is RECORDED overnights.
1AM repeats at 3AM. 2AM repeats at 4AM. At 4:30AM, the station goes live. Not recorded.

FWIW, on MONDAY MORNINGS, (from Sunday nights) the station is LIVE with two anchors, alternating hours....you know. Like is used to be!

This subject was written about here in these hallowed pages, in 2021, though my searches could not find it.

From Wiki, for what that is worth:
"The COVID-19 pandemic had a major effect on the station's daily operations, with only three people at a time in the station's newsroom and most of the station's anchors and news writers remote working. Traffic reports were temporarily reduced, the station's sportscasts were reduced, and some airshifts, mainly overnights, do not feature traffic reports, with some news hours pre-recorded with only reference to the minutes rather than anchors being live, though breaking news in overnight hours is still covered live."

I ALWAYS learn here. Thank you all, for the opportunity! John (in Michigan, for a while.)