Longest day in the year

Answer 1

All days are the same length ... 24 hours ... everywhere on Earth.

If you're actually talking about the longest period of daylight in the year,

then it completely depends on where on Earth you're talking about.

At the south pole:

The sun never sets from September 21 to March 21.

Between the south pole and the Antarctic Circle:

The longest period of continuous daylight is between 24 hours and six months long,

depending on how far south you are. The center of it is December 21.

Between the Antarctic Circle and the Tropic of Capricorn:

The longest daylight is on December 21.

Between the Tropic of Capricorn and the Equator:

There are two longest periods of daylight in the year. They're both on days between

September 21 and March 21, and December 21 is midway between them.

On the Equator:

There are two longest periods of daylight in the year ... on March 21 and September 21.

Between the Equator and the Tropic of Cancer:

There are two longest periods of daylight in the year. They're both on days between

March 21 and September 21, and June 21 is midway between them.

Between the Tropic of Cancer and the Arctic Circle:

The longest period of daylight is on June 21.

Between the Arctic Circle and the north pole:

The longest period of continuous daylight is between 24 hours and six months long,

depending on how far north you are. The center of it is June 21.

At the north pole:

The sun never sets from March 21 to September 21.

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