it's high time

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it is high time

It is the appropriate time (that something happen); it is long overdue (that something happen). Thank you for a lovely meal, but it's high time for us to start heading home. It is high time that someone gives him the punishment he deserves!
See also: high, time
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

it's high time

Rur. it is about the right time for something. It's high time we were leaving. It's high time you started thinking about saving for your old age.
See also: high, time
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

it’s ˌhigh/aˌbout ˈtime (that)...

(spoken) used for saying that something should be done or happen immediately or very soon: It’s high time that this room was properly cleaned!So you’ve started work! It’s about time! (= you should have started a long time ago).
See also: high
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
"I'm sure I think it's high time we were getting acquainted, and I'm going to introduce myself.
Everyone with whom the princess had chanced to discuss the matter said the same thing: "Mercy on us, it's high time in our day to cast off all that old-fashioned business.
It's high time for you to be married," answered the countess sharply and sarcastically.
It's high time you were all in bed!' On various pretexts they all moved off, and Alice was soon left alone.
"I suppose you will stay here in the old place, unless you think of marrying, and it's high time you did," put in Mrs.
"The way I feel at present, Anne," said Marilla, "is that it's high time you had those dishes washed.
'If you don't know Lord George Gordon when you see him, it's high time you should.'
'And now,' said she, 'you have been fed and warmed, and I have heard your story, and now it's high time to call your brother.'
I only know that these people must be conquered, and that it's high time it was done, once for all.'
"Yes, it's high time he went, for he is ready, and as soon as he is off, I shall turn soldier.
'Come,' said Miss Ledrook, 'it's high time we were there, or we shall have poor Mrs Snevellicci thinking that you have run away with her daughter, Mr Johnson; and then we should have a pretty to-do.'
"I suppose," he said, the mockery of his eyes giving a pellucid quality to his tone, "that you think it's high time I told you something definite.
It's high time the BJP thought about the minority communities (Christians and Muslims) or else they will be swept away from the country very soon.
SHANE LOWRY reckons it's high time Irish guys were smiling again.
'It's high time that Filipinos know the truth, para naman magkaroon ng desisyon na maayos, makapagdecide nang maayos ang mga botante kung sino ang dapat [at] nararapat na manungkulan sa ating bansa,' he said.