The day and night parts of the Earth shown are as of Monday, May 22, 2017 at 19:24:00 UTC.
The Sun's position is marked with this symbol: . At this location, the Sun will be at its zenith (directly overhead) in relation to an observer.
The Moon's position is marked with this symbol: . At this location, the Moon will be at its zenith in relation to an observer. Note that the symbol is not showing the current phase of the Moon.
Different shades of darkness are used to indicate night; these shades are in order from lightest to darkest:
Civil Twilight (lightest shade)
Night, no twilight (darkest)
NPC – Northern Polar Circle, or Arctic Circle, is at latitude 66°34' N. At locations north of the Arctic Circle, the Sun is visible all day and night during a period before and after the June solstice.
NT – Northern Tropic, or Tropic of Cancer, is at latitude 23°26' N and is the northernmost latitude at which the Sun can be directly overhead (this occurs during June solstice, around June 21).
ST – Southern Tropic, or Tropic of Capricorn, is at latitude 23°26' S and is the southernmost latitude at which the Sun can be directly overhead (this occurs during December solstice, around December 21).
SPC – Southern Polar Circle, or Antarctic Circle, is at latitude 66°34' S. South of this latitude, the Sun is visible all day and night during summer in the Southern Hemisphere.