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What is Time?
What causes time?
What are the smallest and largest units of time?
What Causes Day and Night?
What Time is it?
What are the units of time?
Time Quizz
What would you like to know next?
Why are there 30 days in September? Why are there time zones and what's with daylight-saving time? Why are there 86,400 seconds in a day?
How long is a day?
Why are there 24 hours in a day?
Why are there 60 minutes in an hour and 60 seconds in a minute?
What do a.m. and p.m. mean?

Time Instruments


What is clock?
When was the first clock made?
Digital Clocks
Analog Clocks(Clocks with Hands)

Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
English conversation lessons - Asking Time

Conversation A

What time do you have?
It's ten o'clock sharp.

Conversation B

What's the time?
It’s almost eight.
Do you have the exact time?
Yes, it's two minutes to eight.

Conversation C

Excuse me. What time is it?
Its a quarter of two.
I guess my watch is slow then.
Well, I know mine isn't fast.

Conversation D

What time is it right now?
It’s a five twenty five.
I've got five thirty five.
You're ten minutes fast then.

Conversation E

Do you have the correct time?
Yes. It's two minutes to three.
Are you sure your watch is right?
It may be a few minutes slow.

What is Time?
Time is a measure of duration.

What causes time?


A time is a decimal number that represents a fraction of a day. Unlike a date whose starting point can depend on various factors, a time is usually stated to start on a non-spatial point called midnight.

Like a date, a time is represented with a combination of numbers and special characters.

A numerical representation of what point in a day it is. Time is displayed in hours, followed by minutes, and then seconds. There are 24 hours in one day, 1,440 minutes in a one day, and 86,400 seconds in one day.


The hour (common symbol: h or hr) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 seconds. It is approximately 1/24 of a mean solar day.

An hour may be represented in a numerical value of 1 to 12 or 0001 to 2400. Several digital clocks and computers running Microsoft Windows utilize civilian time of hours of 1 to 12 and represent the time of day with AM or PM.

Many Unix, Linux and other clocks may use military time, which has no AM or PM and is represented with a value of 1 to 24. Below is a listing of Military time values and their conversions.

Minute and second

A minute is represented in numerical values of 01 to 59. There are 60 minutes in every hour and 60 seconds in every minute.


A date is a number that represents the number of days that have elapsed from a set period in history.

What Causes Day and Night?

Day and night is caused by the rotation of the Earth about its axis. At any given time, the half facing the Sun will be shined upon while the other half will have no light. Places in the former will therefore experience day while places in the latter will experience night.

Of course, since the Earth is rotating, the illuminated places will not be illuminated forever. After some time, it will be their turn to experience night. Now, if only the Earth’s axis was perpendicular to its orbital plane, all places on Earth would experience equal times of days and nights, i.e., 12 hours of day and 12 hours of night. However, this is not so.

The Earth’s axis is actually tilted. Hence, at certain times of the year, those in the northern hemisphere will be exposed to the Sun longer than those in the southern hemisphere. Then as the Earth approaches the opposite side of its orbit, the opposite happens and those in the southern hemisphere will now have more hours under the Sun.

Subsequently, in extreme places like the North and South pole, the Sun may never set or never rise at certain times of the year.

Now, how about the Moon and stars? Why do we only see them at night? Actually, that is not entirely true. There are some days when we do see the Moon in the sky. This happens when it is somewhere in between (not necessarily directly) the Earth and Sun.

Anyway, going back to the Moon and stars question, we see the Moon and stars during the night because they’re the only ones shining in the sky. They’re still there during the day but their faint light simply cannot compete with the Sun’s bright light.

Those times of the year when the northern and southern hemispheres experience their longest days and nights are called solstices. There’s the Summer Solstice and the Winter Solstice.

What are the smallest and largest units of time?
Conversation Questions
Time Instruments
24-hour clock
Time Instruments
Time: Subcategories
What is Universal Time (UT)?

Is Coordinated Universal Time or UTC the same thing as Greenwich Mean Time?

How is the second defined?

What is a leap second?

Is the year 2000 a leap year?

What is an atomic clock?

Who regulates time zones?

What is GMT?
GMT is an absolute time reference & doesn't change with the seasons.

What time is it in the GMT time zone now?
What's the current London time now?
Conversation Questions Free Time & _________
12-hour and 24-hour Clocks
What Time is it?
Time - AM/PM vs 24 Hour Clock
Time Quizz
What are the units of time?


Time answers the question, "What time is it?"

Conversion Chart


1 minute (min.)
60 second (sec.)
1 hour (hr.)
60 minutes (min.)
1 day
24 hours (hr.)
1 week (wk.)
7 days
1 year (yr.)
52 weeks (wk.)
1 year (yr.)
12 months (mo.)

When converting any unit of measurements if you want:

  • To change to a larger unit, divide.
  • To change to a smaller unit, multiply.

Drill and Practice

Click on the pencil to choose your correct answer.

1. The amount of time it takes to take a shower

15 minutes

15 hours

2. The time it takes to wash one load of clothes

45 minutes

45 seconds

3. The time it takes to cook a turkey

6 minutes

6 hours

4. The time it takes to build a house

18 months

18 years

5. The time it takes to change the oil in a car

20 minutes

20 days

Answer the next questions on a sheet of paper and turn them in when you have completed them.

Write the equivalents.

6) 13 months = _______year _____months

7) 46 hours = ______minutes

8) 34 minutes = _______seconds

9) 68 weeks = _____years_____weeks

10) 987 day =______years ____months_____weeks___days