An interesting bar bet might be the question "What is the longest day of the year?" In the northern hemisphere, most people would answer "June 21st". In the southern hemisphere, the answer might be "December 21st". Actually, the correct answer to the question would be September 18 (at least for 1999) when the total solar day length is 24 hours and 21.5 seconds long! The shortest solar day in 1999 is December 23, 1999 when the total solar day length is 23 hours 59 minutes 30.3 seconds (a difference of 51.2 seconds between longest and shortest.)
Pete S.
