Nitpick: Not quite true. Here in California, South Park is at 10 (I’m pretty sure), and then Jon is at 11. Then I think they rerun South Park at 11:30 and rerun the Daily Show the next day at 7. I assume it’s the same everywhere, since neither of those is live. I don’t know if the censoring is different at 11 or 7.
Hmm, okay try this: It might be due to any shooting around that time. Even a local thing or state thing.
Regardless, I can understand why they bleep it out.