The Liberalia Triday Calendaris a proposal for Calendar Reform by Peter Meyer. It combines a solar calendar with a lunar calendar which have tridays (periods of 3 days) in common. Both the solar and lunar calendars start year 0 on 17 March 1904. The three days of the triday are named 1. * Sophiesday 2. * Zoesday 3. * Norasday 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.