Adoption of the Gregorian calendar for secular use occurred in Eastern Orthodox countries as late as the 20th century and some religious groups in some of these countries still use the "old style" (O.S.) Julian calendar for ecclesiastical purposes. The Kingdom of Bulgaria changed from the Julian to the Gregorian calendar during the First World War on 31 March 1916, where the next day was 14 April 1916. The Ottoman Empire's Rumi calendar, used for fiscal purposes, was realigned from a Julian to a Gregorian starting on 16 February/ 1 March 1917. The beginning of the year was reset to 1 January starting in 1918.
Magha (month) usually the eleventh month of the year. Magha (month) Maagha (Nepali: माघ "maagh") is a month of the Hindu calendar. In Nepal's national civil calendar, Maagh is the tenth month of the year, and in the Gregorian calendar it corresponds with January/February. In lunar calendars, Maagh may begin on either the new moon or the full moon around the same time of year, and is usually the tenth month of the year. It is named thus because in this month, the full moon is usually found nearby or within the star cluster called "Magha". In solar calendars, Maagh begins with