Sources: BBC
The General Conference on Weights and Measures votes to stop synchronizing UTC to the standard mean solar time measurement UT1 by 2035. 2022-11-18
Russia gives Ukraine a 5 a.m. (3 a.m. UTC) deadline to surrender the city of Mariupol. 2022-03-21
Facebook, Instagram, WhatsApp, and Oculus experience an extended global outage that began at 15:39 UTC. Some experts believe that the outage was caused by a BGP update from Facebook. 2021-10-4
The U.S. Congress adjourns for the night before reaching a new budget agreement, starting a partial federal government shutdown that began the next day at 12:00 a.m. EST (05:00 UTC). 2018-12-21
The Federal Emergency Management Agency sends its first ever "Presidential Alert", a Wireless Emergency Alerts test message, at 2:18 p.m. EDT (18:18 UTC) to most cell phones in the United States. 2018-10-3
Authorities add a leap second on December 31 to bring UTC more inline with mean solar time. 2016-12-31
NASA's New Horizons spacecraft reawakens at 20:00 UTC in preparation for observing the dwarf planet Pluto and its satellites. New Horizons, launched on January 19, 2006, will begin distant observations on January 15, 2015, culminating with its July 14, 2015 closest approach flyby. 2014-12-6
The first same-sex marriages take place in the United Kingdom after they were given the legal authority to proceed in England and Wales from midnight UTC. 2014-03-29
Pope Benedict XVI announces his resignation, effective February 28 at 8pm CET (7pm UTC). He will become the first pope to resign since Gregory XII in 1415. 2013-02-11
A decision by the International Telecommunication Union on whether to abolish the leap second is postponed until 2015 pending the results of further studies. 2012-01-19