Adoption of the Gregorian calendar Julian to the Gregorian calendar. For example, in the article "The October (November) Revolution" the "Encyclopædia Britannica" uses the format of "25 October (7 November, New Style)" to describe the date of the start of the revolution. Other countries of eastern Europe, most notably Eastern Orthodox countries, adopted the Gregorian calendar in the 1910s or early 1920s. The last country of Eastern Orthodox Europe to adopt the Gregorian calendar for civil purposes was Greece, at the time under military administration following the 11 September 1922 Revolution, with Wednesday 15 February 1923 being followed by Thursday 1 March 1923. The Soviet
Tammuz (Babylonian calendar) Tammuz (Babylonian calendar) Tammuz was a month in the Babylonian calendar, named for one of the main Babylonian gods, Tammuz (Sumerian: "Dumuzid", "son of life"). Many different calendar systems have since adopted Tammuz to refer to a month in the summer season. In the Hebrew calendar, Tammuz is the tenth month of the civil year and the fourth month of the ecclesiastical year on the Hebrew calendar. It is a summer month of 29 days. Tammuz is also the name for the month of July in the Gregorian calendar in Arabic (تموز), Syriac ("ܬܡܘܙ") and Turkish ("Temmuz"). The festival for