A recent trip to Tennessee, U.S.A., had us travelling throughout the night. Around 5:30 a.m., I began to look for signs of daybreak. It was overcast, and we had driven through rain during the night, so although I was not expecting to see a sunrise, I was anxious for the light of day. What I had not accounted for was the fact that we have driven into a time change, and what I thought was 5:30 a.m. was now 4:30. As time went on and I thought that it was now close to 6 o'clock, but it was not getting light, I soon realized that it was in fact 5 o'clock.