TimelineMaps

Follow us through the World War I centennial on Follow wwitoday on Twitter

Calendars and Dates

'December snow.' Hand-painted watercolor calendar for December 1917 by Schima Martos. Particulates from a smoking kerosene lamp overspread the days of December, and are labeled 'December höra,' 'December snow.' The first five days or nights of the month show a couple at, sitting down to, or rising from a lamp-lit table. The rest of the month the nights are dark, other than four in which the quarter of the moon shows through a window, or Christmas, when the couple stands in the light of a Christmas tree.

'December snow.' Hand-painted watercolor calendar for December 1917 by Schima Martos. Particulates from a smoking kerosene lamp overspread the days of December, and are labeled 'December höra,' 'December snow.' The first five days or nights of the month show a couple at, sitting down to, or rising from a lamp-lit table. The rest of the month the nights are dark, other than four in which the quarter of the moon shows through a window, or Christmas, when the couple stands in the light of a Christmas tree.

Image text

December höra

December snow

2½ liter petroleum.

Other views: Larger, Detail, Back, LargerBack

The Old Style (O.S.) or Julian Calendar was 13 days behind the New Style (N.S.) or Gregorian Calendar. Russia used the Old Style Calendar. During the 20th century, the difference between the two was 13 days. January 1 (O.S.) fell on January 14 (N.S.).

Bulgaria changed from Old Style to New Style on March 31, 1916 (O.S.), April 13 (N.S.).

The Ottoman Empire changed from Old Style to New Style on February 15, 1917 (O.S.), February 28 (N.S.).

Russia changed from Old Style to New Style on February 14, 1918 (O.S.), February 27 (N.S.). The Russian Revolutions fell in different months: the February Revolution (O.S.) fell in March (N.S.) The October Revolution began on October 25 (O.S.) but November 7 (N.S.).