Calendars were one of the earliest calculating devices developed by civilizations. Find out about the Mayan calendar in this article.

A paradox is a statement that seems to be both untrue and true at the same time. This article looks at a few examples and challenges you to investigate them for yourself.

Read this article to find out the mathematical method for working out what day of the week each particular date fell on back as far as 1700.

How far have these students walked by the time the teacher's car reaches them after their bus broke down?

What can you say about when these pictures were taken?

Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?

This article explains how Greenwich Mean Time was established and in fact, why Greenwich in London was chosen as the standard.

Astronomy grew out of problems that the early civilisations had. They needed to solve problems relating to time and distance - both mathematical topics.

Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.

On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?

July 1st 2001 was on a Sunday. July 1st 2002 was on a Monday. When did July 1st fall on a Monday again?

Chandrika was practising a long distance run. Can you work out how long the race was from the information?

Alice's mum needs to go to each child's house just once and then back home again. How many different routes are there? Use the information to find out how long each road is on the route she took.

My cousin was 24 years old on Friday April 5th in 1974. On what day of the week was she born?

Look at the changes in results on some of the athletics track events at the Olympic Games in 1908 and 1948. Compare the results for 2012.

Liitle Millennium Man was born on Saturday 1st January 2000 and he will retire on the first Saturday 1st January that occurs after his 60th birthday. How old will he be when he retires?

I found these clocks in the Arts Centre at the University of Warwick intriguing - do they really need four clocks and what times would be ambiguous with only two or three of them?

Describe what Emma might be doing from these pictures of clocks which show important times in her day.

Investigate the different distances of these car journeys and find out how long they take.

A game for two or more players that uses a knowledge of measuring tools. Spin the spinner and identify which jobs can be done with the measuring tool shown.

Not everybody agreed that the Third Millennium actually began on January 1st 2000. Find out why by reading this brief article.

Try this version of Snap with a friend - do you know the order of the days of the week?

Use your knowledge of angles to work out how many degrees the hour and minute hands of a clock travel through in different amounts of time.

How many days are there between February 25th 2000 and March 11th?

Can you rank these quantities in order? You may need to find out extra information or perform some experiments to justify your rankings.

If Tom wants to learn to cook his favourite supper, he needs to make a schedule so that everything is ready at the same time.

The pages of my calendar have got mixed up. Can you sort them out?

In this matching game, you have to decide how long different events take.

Can you place these quantities in order from smallest to largest?

Can you put these times on the clocks in order? You might like to arrange them in a circle.

These pictures show some different activities that you may get up to during a day. What order would you do them in?

Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.

Can you put these mixed-up times in order? You could arrange them in a circle.

This investigation explores using different shapes as the hands of the clock. What things occur as the the hands move.

These clocks have only one hand, but can you work out what time they are showing from the information?

Stuart's watch loses two minutes every hour. Adam's watch gains one minute every hour. Use the information to work out what time (the real time) they arrived at the airport.

Nirmala and Riki live 9 kilometres away from the nearest market. They both want to arrive at the market at exactly noon. What time should each of them start riding their bikes?

Follow the journey taken by this bird and let us know for how long and in what direction it must fly to return to its starting point.

During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen?

Use the information to work out the timetable for the three trains travelling between City station and Farmland station.

This article for teachers suggests ways in which dinosaurs can be a great context for discussing measurement.

What is the date in February 2002 where the 8 digits are palindromic if the date is written in the British way?

These clocks have been reflected in a mirror. What times do they say?

In this version of the story of the hare and the tortoise, the race is 10 kilometres long. Can you work out how long the hare sleeps for using the information given?

Do you know the rhyme about ten green bottles hanging on a wall? If the first bottle fell at ten past five and the others fell down at 5 minute intervals, what time would the last bottle fall down?

How many of this company's coaches travelling in the opposite direction does the 10 am coach from Alphaton pass before reaching Betaville?

Can you create a story that would describe the movement of the man shown on these graphs? Use the interactivity to try out our ideas.

On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?

Read about the history behind April Fool's Day.