A phrase used to describe a stark difference between two things. Similar to day and night, except it implies an improvement of the situation rather than a deterioration.
Democrat: "Wow, I'm so happy that Obama is in the White House now. The difference in our country's leadership has been night and day."
Republican: "Actually it's been day and night. George W. Bush was the man."
Independent: "You're both wrong. It's been night and night. Both parties are corrupt as hell."
Libertarian: "No, I'd say it's been more of dusk and twilight."
Left-leaning moderate: "You're crazy. It's totally been dusk and dawn."
Normal person: "Seriously guys, shut up."
by Nicholas D March 15, 2009
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a phrase use to denote different or far from. 'Day and night' conveys a similar meaning.
1. She is a bluestocking and night and day (=different) from her contemporaries.
2. What she has achieved so far in her studies is night and day from (=far from) satisfactory.
by uttam maharjan November 24, 2011
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When something (i.e. a party, rain, etc.) happens all through the night and continues into the day.
by Jaeber July 21, 2014
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A Beatles, song, movie, and album (actually a soundtrack for the film) All three of them are absolute classics. The phrase 'a hard day's night' was actually created accidentaly by Ringo Starr, who often combined two phrases to create a new one.
"It's been a hard day's night!"-Ringo Starr
by Jackie January 18, 2005
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A) the Beatles' first movie that hit the big screens in 1964. Has the same name as the album also released that year.

B) one of Ringo Starr's many idiosyncrasies

C) a cooler way of saying "I've had a tough day."
George: How was your day, then?"
Ringo: rubbish, really. It was a hard days night, you know.
by amelia riversong October 16, 2010
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3rd album by The Beatles, released in 1964.

--TRACKS--
-SIDE 1-
A Hard Day's Night
I Should Have Known Better
If I Fell
I'm Happy Just To Dance With You
And I Love Her
Tell Me Why
Can't Buy Me Love
-SIDE 2-
Any Time At All
I'll Cry Instead
Things We Said Today
When I Get Home
You Can't Do That
I'll Be Back

A Hard Day's Night is the 1st Beatles' Movie too, released in the same year of the album.
by FabFour_03 July 3, 2018
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It's been a hard day's night
And I've been working like a dog
It's been a hard day's night
I should be sleeping like a log
But when I get home to you I'll find the things that you do
Will make me feel alright

You know I work all day
To get you money to buy you things
And it's worth it just to hear you say
You're gonna give me everything
So why on earth should I moan, 'cause when I get you alone
You know I feel ok
When I'm home

Everything seems to be right
When I'm home

Feeling you holding me tight, tight, yeah

It's been a hard day's night
And I've been working like a dog
It's been a hard day's night
I should be sleeping like a log
But when I get home to you I'll find the things that you do
Will make me feel alright, oww

So why on earth should I moan, 'cause when I get you alone
You know I feel ok

When I'm home everything seems to be right
When I'm home feeling you holding me tight, tight, yeah

Oh, it's been a hard day's night
And I've been working like a dog

It’s been A Hard Day’s Night
I should be sleeping like a log
But when I get home to you I'll find the things that you do
Will make me feel alright
You know I feel alright
You know I feel alright
by Zultroid December 16, 2020
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