The Vesper year opens on the spring equinox — March 1 in Vesper, which is March 20 in the Gregorian calendar. In 2026 that day is a Friday, and every Vesper month after it also begins on Friday.
There are thirteen months of twenty-eight days: March through February, then a thirteenth month named Vesper. Because the year begins in March, the Latin number-names line up again: September is the seventh month (septem), October the eighth (octo), November the ninth (novem), and December the tenth (decem). The year closes on Vesper 28 (Gregorian March 18 in a common year). The next day is Turning Day — an extra day with no date and no weekday — and the day after that is March 1 of the new Vesper year.
In a leap year there are two extra days in a row after Vesper 28: Turning Day, then Vesper Day. February 29 is an ordinary numbered Vesper date, and the new year still opens on March 20.
Vesper signs follow current sidereal spans, not one sign per month. The living name is shown first — The Champion, The Healer, The Visionary — with the traditional name and Vesper date range beside it. Serpentis is the thirteenth sign (The Healer). Turning Day and Vesper Day belong to The Empath.