When the streets sparkle like diamonds.

During those between season times, when fall turns to winter or when winter turns to spring. In the daytime pavement is naked and exposed but wet. You wait out the rush hour traffic it gets colder, water freezes and the streets sparkle like diamonds as you ride home drunk, just a tad, and the tires are quiet and it is good, instead of slushy and nasty the streets sparkle like diamonds.