Hmmmm....Wait a second
Okay, it makes sense that a festival of live-music would still be going on at 9:15 PM.
Very interesting. According to joy the curious, DR left his house for a jog In the "late afternoon", and by the time he arrived to the del-win, the polka fest was in "full swing".
Generally, I would consider "late afternoon" to be 4-5. But that is arbitrary, I know some people who think 1pm is morning. Anyhow, what's important is that DR placed himself at the polka fest at some point during the day/evening. To me, DR's statement about the polka fest being in "full swing" seems to suggests that by the time he arrived the polka fest was moving quickly forward, not at the start or end, but somewhere in the middle of the festival. Assuming that 4:30 is what DR meant by "late afternoon" than one would have to assume that he arrived at the fest at 5-5:30 (30min - 1 hour jog). Assuming that DRs recollections and my observations are correct, I would have to assume that the polka feat ended sometime after 6. Maybe it ended at 8-10? I wish we had something to go off of.