Does sound travel better at night?

Less grunge in the electricity, you are more relaxed, I believe most of us perceive our systems sound better in the evening.

My system sounds better at night too and I have determined it must be the quality of electricity coming throught the wall. As the neighbors and the city use less electricity, my belief is it allows cleaner electricity to flow and allows for better quality sound. I can't back it with science, but some smart audiogon member probably can.

From 2 to 4:00am is the best in my location.

Rephrasing G m c I'd say electro-magnetic waves travel better at night.
Since we're dealing more with sound waves that have more mechanical nature the sound quality solely depends on the wall's power outlets.

Yes, it does! Most definitely! I can hear more car alarms, dogs barking, door slamming, screaming, crying, moaning, howling, singing, etc. at night than I do during the day! What gives?

Sorry, as far as sound systems go, refer to the answers above! I would agree with them in the electricity issues.