World Time Starts Here

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The International Meridian Conference, Washington, 1884

The Prime Meridian at Greenwich becomes the point of reference

In tune, on time and in time

Prime Meridian

Longitude Zero

What is the definition of a second?



Precise Clock

Time Management Part II

Lunar Calendars

Measuring Time by Days and Months



Other links

All in One: World and Local Clocks

Digital timepieces for real and virtual travel

Bristol Time

What is Bristol Time?

British Summer Time

British Summer Time (BST) is the UK name for Daylight Saving Time

Calendar Systems

The systems that sort out the year

GMT Timestamp

GMT Server Time Stamp:

Roman Numerals

Why do clocks use IIII instead of IV for 4?

From Plot Device to Philosophy : Shakespeare and Time

Measuring Time in the 16th Century

BBC Pips

Greenwich Time Signal

For 75 years the major global news headlines of the day have been preceded by the six Greenwich Time 'pips'.  When the news of Neil Armstrong's first steps on the moon , President John F Kennedy's assassination and the destruction of the Berlin Wall were broadcast across the world on the BBC, they followed the familiar sound of the Greenwich pips.

Time and Cricket

A complex relationship

Why is the Navy so involved in time-keeping?

The earliest users of accurate time were the navy

A.M. and P.M.

What is Noon and Midnight?

Solstice and Stonehenge

Summer Time

Daylight Saving Time

Military & Civilian Time Designations

From Time Zone A - Z

British Summer Time (BST) Dates Since 1950

When did summer time start and end ?

How GMT is being used today?

Uses of GMT go from email time stamp to air travel

Frequently Asked Questions - FAQs

UK Clock Changes and the Anatomy of a Second

GMT, BST, UTC - plus EU legislation

A Chinese New Year

Did Columbus find longitude?

Christopher Columbus

Columbus twice claimed to have found his longitude by timing lunar eclipses. These claims are probably false.

The International Meridian Conference

Washington DC, USA - October 1884

Extract from one of the middle sessions of the Conference:

The International Meridian Conference

Washington DC, USA - October 1884

From pages 199 to 204:

Greenwich Mean Time - World Time

Time in GMT right now

A Brief History of British Summer Time (Daylight Saving Time)

Standard Time Becomes Normal

Days of the Week

Official European Union Languages

A multi-lingual Monday to Sunday

Global Time

What time is it now across the World?

By using your computer's clock, this calculates the time in other time zones all over the world! Useful if you communicate across different time zones for business or leisure.

ISO Time

What is the time in ISO format?

Leap Second

The adjustment between Atomic & Earth Time

The Coordinated Universal Time (or UTC) replaced Greenwich Mean Time (GMT) as the reference time scale derived from The Temps Atomique International (TAI) calculated by the Bureau International des Poids et Mesures (BIPM) in Paris, France using a worldwide network of atomic clocks. UTC differs from TAI by an integer number of seconds; it is the basis of all activities in the world.

Mardi Gras

"Fat" or Shrove Tuesday

When did the millennium begin?

This millennium (and century) officially began on: 1 January 2001 GMT

Name of Months

Month names ~ every major European language

A linguist's calendar

Astrology: Natal Chart

The planets at the moment of your birth

Astrologers believe that the planets at the moment  of your birth have key influences on your personality.  In order to calculate your Natal (or birth) Chart you will need to know the Time and Place of your birth.  Most people know their Sun sign (the position in the zodiac that the Sun was in on your birth-date.  The position of all the planets is described in your Natal Chart.  You will also need an Ephemeris to help calculate this.

New Zealand at Autumn Equinox Time

Free Newsletter


Network Time Protocol

NTP is a protocol designed to synchronize the clocks of computers over a network. NTP version 3 is an internet draft standard, formalized in RFC 1305. NTP version 4 is a significant revision of the NTP standard, and is the current development version, but has not been formalized in an RFC. Simple NTP (SNTP) version 4 is described in RFC 2030.

Oxford Time

What is Oxford Time?

Panchang - Indian Astrology

Master your time - master your life

Panchang is a system of astrology from India that helps you act powerfully and get more out of life by boosting your confidence and thus increasing your effectiveness.  Panchang is a way for the individual to use timing to their advantage by, for example, calculating the best time to buy or sell property.  Panchang, which uses Indian astrology allied to detailed time planning... Essentially, it is a time-management system... People are using it to select when to make a presentation, to launch a new product or to go for an important interview.

Railway Time

What is the International Atomic Time Scale?

What is the SI unit of time?

Official definition of a second

The Winter Solstice


History of Sundials

Time is money?

Time Management

It's official: we're ruled by time

Time is the most popular common noun in English

Time Websites

Royal Observatory Greenwich

Standard Time

The History of Time Zones

GMT - Greenwich Mean Time

Global Time Zones - What time is it anywhere in the World?


Time Ball

What time does the time-ball drop at Greenwich?

In 1833 a red "Time Ball" was installed on the roof of the Royal Observatory Greenwich

World Time Zone Map

Map of Global Time Zones

UTC - Universal Time Coordinated

What is Coordinated Universal Time?

Zulu Time

What is "Zulu" time?

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