id summary reporter owner description type status milestone component version severity resolution keywords cc 10087 Need to update date_time_zonespec.csv for Moscow Eric C James E. King, III "Starting in 2011 Russia passed a law to switch to be on daylight savings time permanently. http://en.wikipedia.org/wiki/Moscow_Time ""On 27 March 2011, Muscovites set their clocks forward for a final time, effectively observing MSD, or UTC+4, permanently. On March 29th, 2014, after the accession of Crimea to the Russian Federation the Republic of Crimea and the city of Sevastopol switched their time to MSK."" --- So all in all, for boost we'll need to replace: Europe/Moscow MSK MSK MSD MSD +03:00:00 +01:00:00 -1;0;3 +02:00:00 -1;0;10 +03:00:00 With: Europe/Moscow MSK MSK +04:00:00 +00:00:00 +00:00:00 " Bugs closed Boost 1.67.0 date_time Boost 1.55.0 Problem fixed moscow timezone tz tzdatabase