When does the longest night of the year occur?

-- If you live south of the equator, then it's the night of June 21 or 22.

-- If you live more than 66.5 degrees south of the equator, then once a year,

the sun fails to rise for more than 24 hours, and the middle of that period is

sometime on June 21 or 22.

-- If you live at the south pole, then the longest night is 6 months long, from March 21 until September 21 or 22.

-- If you live north of the equator, then it's the night of December 22 or 23.

-- If you live more than 66.5 degrees north of the equator, then once a year,

the sun fails to rise for more than 24 hours, and the middle of that period is

sometime on December 22 or 23.

-- If you live at the north pole, then the longest night is 6 months long, from

September 21 or 22 until March 21.