#Utc time offset plus

The United States and many other countries use the Christian Gregorian calendar to mark years. United States ANSI X3.30 and NIST FIPS 4-1, The date format Year-Month-Day has become widely accepted as a standard in many countries. The world time zone map The Differences Between GMT, UTC, and IDL Time Offset and Time Zones Current Coordinated Universal Time (UTC) The Daylight Saving. Virtually the entire world formats time as Hours:Minutes:Seconds (hours listed before minutes, minutes listed before seconds).

REFERENCE: A Briefer History of Time - Howard Barnes, Georgi Dobrovolski Solar Observatory, New Zealand, 2010.

UTC - civil atomic time scale on or about the Greenwich meridian kept within 0.9 seconds of UT1.

UT2 - UT1 corrected for seasonal variation in the Earth's rotation (a smoothed scale that does not reflect the real periodic variations in the Earth's angular position).

UT1 - UT0 corrected for polar motion (widely used).

The time 00 hours being at Greenwich mean midnight.

UT0 - mean solar time on the Greenwich meridian obtained from direct astronomical observation.

UT - An abbreviation (for Universal Time) that should be used to show approximation of all the below.

second - One second (1 s or 1 sec.) is the duration of 9,192,631,770 periods of radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom (Cs). dt tzoffset( t ) returns an array of durations equal to the time zone offset from UTC of each datetime value in t.

Mean solar time - a measurement of the Earth's rotation with respect to the 'fictitious' mean sun.

Atomic clock - usually multiple clocks that count seconds (average of all clocks in system) based on the frequency of the cesium 133 atom (Cs) which oscillates at 9,192,631,770 Hertz.

DST was never practical and will eventually be phased out (obsolete). There is no consistency between regions as to when DST takes affect, or reverts back to standard (real) time. Twenty four hour time does not use 'am' or 'pm', but courts hours from midnight (0 hours) to 11 pm (23 hours).ĭaylight savings time (DST) is used in the summer months in some regions. Daylight savings time adds 1 hour to the local standard (real) time.

#Utc time offset plus

Time in other locations will be the UTC time hour plus or minus the local Time Zone. UTC time is the local time at Greenwich England. Greenwich England is, by definition, in the middle of Time Zone 0, the prime meridian. Each time zone is 1 hour long, or 15° wide in longitude. The earth is divided into 24 time zones, -11 to +12. GMT was established by international conference in 1884 as International Time. UTC is commonly referred to as International Time, Universal Time (UT), Zulu Time (U.S. Local time is based on time zone and Coordinated Universal Time (UTC).