January has 31 days.
the days of the week
He runs five miles every day.
I saw him the day before yesterday.
We leave the day after tomorrow.
He was last seen alive five days ago.
I'll be seeing Pat in a few days
It will take ten days. (Key English Test; A2; Arabic)
a bright, sunny day
It's rained all day today.
These animals sleep in the day and hunt at night.
It is better to spend your day exploring the museums and ancient buildings in the city. (Preliminary English Test; B1; Farsi)
a normal working day
I work a seven-hour day.
We have to work a six-day week to cope with demand.
She's at home today - she's having a day off.
I have to get some sleep - I've got a big day tomorrow.
Tuesday is my free day. (Key English Test; A2; Spanish)
Vegetarianism is very popular these days.
How are you these days? (Key English Test; A2; Chinese)
One day, I came home to find my windows smashed.
One day, I was reading an interesting book when someone called me. (Preliminary English Test; B1; Italian)
Didn't I see you in the post office the other day?
For example, the other day I stayed in my house all day watching television in bed. (Preliminary English Test; B1; Spanish)
One of these days I'll tell her what really happened.
I hope one day you will come with me. (Preliminary English Test; B1; Japanese)
They haven't been seen for days.
I had to wait for days while the car was being repaired. (First Certificate in English; B2; Portuguese)
In those days, boys used to wear short trousers.
In those days, life was much harder than now. (First Certificate in English; B2; German)
in my younger days
This book was written before the days of computers.
Before the days of television, we had the radio. (Certificate in Advanced English; C1; Swedish)
This place isn't as good as it was in the old days!
In the old days, a scholar could spend years of his life in search of specific information, which now can be easily and inexpensi[ve]ly found at the click of a button! (Certificate in Advanced English; C1; Greek)
It's almost midnight - let's call it a day.
She decided to call it a day, so Meredith mustered all her courage and wrote a letter to him: "You are not good enough for me," she told him. (Certificate of Proficiency in English; C2; Spanish)
Seeing those little kids having so much fun just made my day.
Thank you for returning [my] lost diary; you have made my day! (Certificate of Proficiency in English; C2; Dutch)
This jacket has seen better days.
In the dense fog he managed to see a man standing nearby, whose clothes ha[d] definitely seen better days. (Certificate of Proficiency in English; C2; Polish)