Calendar site
Calculation of the Ecclesiastical Calendar
Software for Working with Calendars
Unix Emacs commands for converting from the Julian and other calendars
Fortran software for converting to and from The Julian Calendar
Work with the Muslim Calendar using The Islamic Timer Unix software
For Julian dates and astronomical data (for the modern period only), see Astronomical Sky Calendar
Astronomy and chronology sites
The Seven-Day Week
Phases of the Moon
Clocks and Time: Horology site for books, magazines, organizations, museums, PC synchronization software, time standards.
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