In which year was the World's Time Standard (UTC) officially adopted?

Coordinated Universal Time (UTC) is the basis for civil time today. This 24-hr time standard is kept using with highly precise atomic clocks. The world's timing centres have agreed to keep their time scales closely synchronized or coordinated. Two components are used to determine UTC: International Atomic Time (TAI): A time scale that combines with the output of some 400 highly precise atomic clocks worldwide to provide the exact speed for our clocks. The Universal Time (UT1): Also known as solar time, refers to the earth's motion. UT1 was created at the International Meridian Conference in 1884. This is the basis for the 24-hr time zone system we know today. The Prime Meridian was determined to be the transit circle at the Royal Observatory in Greenwich, London. In 1960, the International Radio Consultative Committe formalized the concept of UTC. And UTC from GMT was officially adopted in 1967. UTC was adjusted several times until 1972, when leap seconds were introduced to keep UTC in line with earth's ever slowing rotation, which is less exact than atomic clocks.