Length of the day including the TWILIGHT ZONES for a given location and for a given date.

(Including "Atmospheric Refraction") - (For the local times of sunrise, real-sun transit,and sunset, add

1. The equation of time correction.

2. The local longitude correction, and

3. the summer saving time correction.)

Latitude of the city of your choice = a, (minus sign for Southern Latitudes.)
Type 4 digits for the year : ,
type 1 or 2 digits for the month : ,
and type 1 or 2 digits for the day of the month : .

The length of the day from the apparent sunrise to the apparent sunset becomes hours, and minutes.

The length of the day from the morning civil twilight to the evening civil twilight becomes hours, and minutes.

The length of the day from the morning nautical twilight to the evening nautical twilight becomes hours, and minutes.

The length of the day from the morning astronomical twilight to the evening astronomical twilight becomes hours, and minutes.

Other Cities
CITY LATITUDE (N) LONGITUDE (E)
London 51 0
Tel Aviv 32 35
Cairo 30 31
Wien 48 16
New York 41 -74 (74W)
Tokyo 35 140
Singapore 1 104
Manila 14 121
Bangkok 13 100
Anchorage (ALASKA) 61.2 -150
Tucson 32.25 -110.95
Addis Ababa 9 39
Phoenix 33.5 -112.05

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