Kalendae

The term "Kalendae" refers to the first day of the ancient Roman month. This day was significant because it was when the Nones (the ninth day before the Ides) were announced by the pontifices, who would proclaim whether the Nones would fall on the fifth or seventh day of the month. The Roman calendar evolved over time. Initially, it had 10 months and 304 days, starting in March and ending in December, with an uncounted winter gap. Tradition holds that Numa Pompilius added January and February, creating a 355-day year. Later reforms, including the introduction of the Julian calendar by Julius Caesar, aimed to align the calendar more closely with the solar year and seasons. The Julian calendar established a 365-day year with a leap day added every four years.12345