Comment Comment by anticristi Very well summerized. For those who care about the longer version:https://en.m.wikipedia.org/wiki/International_Atomic_Timehttps://en.m.wikipedia.org/wiki/Universal_Timehttps://en.m.wikipedia.org/wiki/Coordinated_Universal_Time parent anticristi 5 years ago
https://en.m.wikipedia.org/wiki/International_Atomic_Time
https://en.m.wikipedia.org/wiki/Universal_Time
https://en.m.wikipedia.org/wiki/Coordinated_Universal_Time