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No Daylight Saving Time in UTCĭaylight Saving Time (DST) is not used for UTC as it is a time standard for all time zones.Convert timezones and find the best time for your meeting in However, many time zone boundaries are distorted by geographical and political factors.

In theory, the UTC offsets countries use should reflect the local mean solar time. Two time components are added together to translate mean solar time to Coordinated Universal Time (UTC): International Atomic Time (TAI) measured by atomic clocks and Universal Time (UT1), the actual length of a day on Earth.

For every 15 degrees of longitude east or west, mean solar time changes by 1 hour. Primarily, UTC is based on mean solar time at the prime meridian running through Greenwich, UK. The offset is expressed as either UTC- or UTC+ and the number of hours and minutes. All time zones are defined by their offset from UTC.

UTC-Coordinated Universal Time-is the 24-hour time standard used as a basis for civil time today. The graph above shows that there is no clock change in UTC during 2023.