Online-Photoperiod Calculator V 1.94 L   Author: J. Lammi  ( © 1996 - 2008) jjlammi@yahoo.com

Computation of Daylengths, Sunrise/Sunset Times, Twilight and Local Noon

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Select for dates
Use the current date
Input a date value		 Select for locations
Use menu of cities
Input latitude & longitude		 Daylight savings

Set ON/OFF
Calculation Date
Year   		Month   Day
Location
Latitude ° ´ N S   Find latitudes
Longitude ° ´ W E   Find longitudes
Local time h min TZ Find timezones
Temperature oC Refraction

This is the fail-safe version which has no cookies to restore your location parameters while loading.
To change the location parameters, do edit the JavaScript function GetLastVisit()

New! See my Midnight Sun Pictures
Scout Report for Science and Engineering Selection (October 15, 1997)
  Place 30 of Top 100 Time Sites

Visited times since November 10, 2001


Contacts: Yahoo mail

On the Factors affecting Computation Accuracy

Browser requirement: Netscape Navigator 4.0 or MS Internet Explorer 4.0 at least
Last modified on September 14, 2008