Which place has the longest day and shortest night on 22 Dec?

The place that has the longest day and shortest night on December 22 is the South Pole. This is because Earth's axis of rotation is tilted at an angle of 23.4 degrees, and on December 22, the South Pole is tilted the most directly toward the Sun. As a result, the Sun is visible at the South Pole for 24 hours on this date.