Sun Calendars
They indicate for each day of the year the time of sunrise and sunset, the duration of the day and the number of minutes gained or lost from the previous day.
For the 21st of each month, a clock summarizes the respective hours of the day and night, and the time when the Sun cross the local meridian. The maximum elevation of the Sun above the horizon is provided in the form of a schematic diagram.
Examples for several cities in the world are freely available on our ftp server.
Other cities can be added on request.
All solar calendars are also valid for the polar regions,
indicating the midnight sun and polar nights.