Гайкянский календарь
The Hayk Calendar, or the Ancient Armenian Calendar, is a traditional Armenian system of timekeeping, the beginning of which, according to historical calculations and tradition, is associated with August 11, 2492 BC, when the patriarch of the Armenians, Hayk, defeated the tyrant Bel. This solar movable calendar consisted of 365 days, which were divided into 12 main months, each lasting 30 days, and one additional short 13th month called Avelyats, which had 5 days in common years and 6 days in leap years. The New Year was celebrated on the 1st of the month of Navasard, corresponding to August 11, and on this day, the ancient Armenians celebrated the Navasard festivities with great pomp. The 12 main months of the calendar were Navasard, Horin, Sahmin, Tren, Kaghots, Arats, Mehekank, Areg, Ahekank, Marerin, Margats, and Hrotits, which, according to tradition, were named after the sons and daughters of Hayk the Patriarch. One of the most remarkable features of this system was that Armenians named not only the months of the year but also all 30 days of the month, the five days of the Avelyats month, and even all 24 hours of the day, such as Khavarak, Aghjamughj, Aravot, or Charagaytial. The days of the week also had their names, which were associated with celestial bodies such as the Sun, Moon, and known planets. Over time, this calendar was used in various fields of Armenian life, and in 1513, the first printed calendar, "Pazratum", was published in Venice by Hakob Meghapart. How