According to the Law of Ukraine, in cases where a public holiday falls on the weekend (Saturday or Sunday), the weekend is extended by one day.
Red marks the official holidays wich are days off.
Brown marks the official holidays which are working days.
Green marks the celebrations, which change date.
18 December
• The Commission Council of the Soviet Union approved the resolution «Registration of Musical Instruments» (1920).
• The liberation of Ukraine from the German invaders began (1942).
• The Communist Party's Central Committee (Bolshevik) in Ukraine decided to publish the Ukrainian Soviet Encyclopedia (1957).