Both the solar and lunar calendars start year 0 on 17 March 1904.
The three days of the triday are named
So 17 March 1904 is a Sophiesday. Its Julian day number is 2,416,557 which is divisible by 3, so the Sophiesdays are those days whose Julian day number is divisible by 3.
The lunar calendar gives a very rough indication of the moon phase, not only because every month is a whole number of tridays (either 30 or 27 days), but also because the short 27-day months are not as evenly spaced as possible. However spacing the short months as evenly as possible would give rise to either a more complicated calendar or one in which the lunar years have a variable number of months.
- Solar date
- Lunar date: ±C*C-YYYL-Q-T-D
A cycle consists of 384 lunar years, each 354 or 357 days long.
|4||Abrasax||30 (31)||90 (93)|
|Sum||121 (122)||363 (366)|
Abrasax only has 30 tridays if the solar year number plus one is divisible by 4 or by 198.
|12||Eleleth||9 (10)||27 (30)|
|Sum||118 (119)||354 (357)|
Eleleth has 9 tridays unless the lunar year number minus 2 is divisible by 8 and is not 2.
- The Liberalia Triday Calendar by Peter Meyer.