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Calendar Representation
A simplified web representation of the Light Calendar is available here:
- PHP Light Calendar
- Astronomical Clock, calendar on the data page (use the [i] button)
The PHP calendar is useful as an interactive view of the Light Calendar. It shows the structure of a complete Light Year without requiring the calendar to be used as an everyday date system.
The calendar displays the twelve Light Months together with several reference points from the solar, lunar and civil year.
Among other things, it shows:
- the four transitional parts of the year, early spring, early summer, early autumn and early winter, with different colours;
- the principal astronomical fixed points within the Light Months;
- the lunar cycles and their relevant nights;
- Easter and Christmas within the Light Calendar;
- the corresponding Gregorian date for each Light Calendar day as a mouseover title.
This makes it possible to move through a year and see how different systems overlap: the Light Seasons, the Light Months, the Moon, familiar festivals and the Gregorian calendar.
The web representation does not perform the full astronomical calculations used for the Light Seasons. It is intended mainly for orientation and for exploring the structure of the calendar. Its dates should therefore be read as a practical approximation, while the solar-longitude crossings remain the astronomical reference. Times are shown in Central European Time (ME(S)Z).
The Light Seasons can be used on their own. The calendar representation is an additional layer built around them.
It gives the light year:
- a defined year start,
- twelve Light Months,
- a date notation,
- and an optional lunar index.
These rules make the solar structure readable in a familiar calendar form without changing the underlying astronomical definition of the Light Seasons.
The calendar is therefore best understood as a way of making the light year visible on a page. It is not required in order to observe or use the Light Seasons themselves.
The calendar structure starts with the Light Months.