Orthodox Christians celebrate Old New Year or the Orthodox New Year on January 13, 2021. The day marks the start of the New Year by the Julian calendar, which pre-dates the Gregorian calendar. In the Gregorian calendar this day falls on January 14 between 1900 and 2099. Starting in 2100 until 2199, celebrations will be held on January 15. The Orthodox New Year is no federal public holiday and therefore no day off. However, many people celebrate the day.
Old New Year is observed annually; mainly in Russia, Serbia, Macedonia, Montenegro, Georgia, Belarus, Kazakhstan, Uzbekistan, Azerbaijan, Ukraine, Bosnia and Herzegovina, Moldova, Wales, and Switzerland. Scotland traditionally celebrates the Orthodox New Year on January 12. However, Orthodox Christians around the world celebrate Old New Year, for example those who live in Canada, the United States, and Australia. India celebrates January 14 as Makar Sankranti: the day the sun starts moving northward again.