Timezone abbreviations

This is an overview of all currently used time zones. Some can be found several times, e.g. for the CET zone (central european time) the abbreviation MEZ (mitteleuropäische Sommerzeit) is also used in German.

In addition to the time abbreviations listed in the list, there are a number of other time designations that can be stumbled upon, e.g.

TAI (Temps Atomique International), the international atomic time. Since it is based exclusively on an atomic time standard, it deviates increasingly from the usual time scales, which are based on solar time.

UT1 (Universal Time No.1) is such a solar time, which is determined by astronomical observation. Ultimately, it is based on the Earth's angle of rotation to the Sun, so unlike the TAI, it is not a uniform measure because it reflects changes in the Earth's rotation. There are other UT variants such as UT0, UT1D, UT1R and UT2, but all of them are usually only important for special scientific disciplines.

In the following overview, it should be noted that the same abbreviation is sometimes used for several time zones.
A country can also extend over several time zones.