Mom (scolding child) : Where are you John?
John : Yes, mom.What happened?
Mom : See the condition of your room, It is at sixes and sevens.

In the above conversation the idiom sixes and sevens has to do nothing with the number six and seven. Hence we can say that Idioms don’t mean exactly the words say.

In a nut shell, Idiom (also called idiomatic expression) is an expression, word, or phrase that has a figurative meaning conventionally. This meaning is different from the literal meaning of the idiom’s individual

Why one should use Idiom?
Idioms are the best way to express what we want to say, especially in an intriguing manner.
They are said to be the pillars of English. language.They not only play an essential role in making the language interesting and dynamic but also bring a spectacular illustration to everyday speech. They provide interesting insights into the use of words, languages and thought process of their speakers.They have a sense of mystery and fun about them.

The following Idioms about time:

Time flies

Meaning: Time passes extremely quickly

Example: Look how fast our children grew up, how time flies.

It’s high time

Meaning: It’s the right time to do something, or past the appropriate time to do something.

Example:It’s high time to do something for the country’s progress.

Third time’s a charm

Meaning: The third time you do something it will finally work.

Example: I had proposed her three times and finally she said yes.. Well you know… Third time’s a charm.

Beat the clock

Meaning: Finish something before time is up, before a deadline.

Example:I was informed late about the project but I managed to beat the clock and completed it before the date of submission.

Better late than never

Meaning: Doing something late is better than not doing it at all. It can be used sarcastically if someone is very late.

Example: Well hello John. Better late than never, huh? Class started half an hour ago.

At the eleventh hour

Meaning: Almost too late or at the last possible moment.

Example: The doctor was called at the eleventh hour.

In the long run

Meaning: In the long term, over a long period of time.

Example: Taking good diet is going to help us in the long run.

Make up for lost time

Meaning: To catch up, to do something intensely to make up for a long period of not doing it.

Example: Where have you been for so long? I ran into Katie, we had to make up for lost time and talked for hours.

In the nick of time

Meaning: at the last possible moment, just before it’s too late.

Example: I made it to the wedding in the nick of time, I almost missed the ceremony.

Ship has sailed

Meaning: A lost opportunity, missed shot.

Example: I should call Annie, I’ve been thinking about her lately. Sorry Chad, that ship has sailed. She got married last month.

Around the clock

Meaning: for 24 hours, without stopping.

Example: I know it’s very late, but I really feel ill. Do you know which pharmacy is open around the clock?

Call it a day

Meaning: To finish working on something, a day’s work’s been completed.

Example: We’ve been working for a long time on this with no progress. Let’s call it a day and come with new ideas tomorrow.

In one stroke

Meaning: Immediately, at the same time.

Example: I went out to run errands and managed to do everything on one stroke.

Not born yesterday

Meaning: Experienced, not naïve or easily fooled.

Example: You can’t expect me to believe that the vase broke itself. I wasn’t born yesterday, you were playing ball with the dog in the house.