“The official end of the work day is at five, but a lot of us end up sticking around until six thirty or seven most days.”
There's a new employee working in your department. It's her first day on the job. She asks you what time work finishes. You give her a complete answer.
The official end of the work day is at five, but a lot of us end up sticking around until six thirty or seven most days.
This phrase is used for telling the final result of something. It can be used when telling stories, like in the example above. It can also be used for predicting the future consequences of an action:
If you keep missing classes, you're going to end up failing your grade and having to repeat it.
Another phrase that's similar to "end up" but more casual is "wind up":
After we left the bar, I wound up going over to James's place and sleeping on the couch.
"Stick around" means to stay. It is a more casual way to describe staying somewhere. You can use it when talking to people in social situations:
Hey, why don't you stick around and have dinner with us?
I'd love to stick around, but I have to go pick up the kids from soccer practice.
Or you can use it in professional situations if you want to sound casual:
Hey, would you mind sticking around for a bit after the meeting? There's something I want to run by you.
Your "work day" is the hours when you start and finish work each day. You can talk about your work day like this:
My work day is from 8 a.m. to 4 p.m.
Here are some of the ways of saying what time it is.
For the time 4:00:
For the time 4:15:
A quarter after four
A quarter past four
For the time 4:30:
For the time 4:45:
A quarter to five
For the time 4:05:
Four oh five
Five after four
Something that is "official" is approved by the authorities (the people who are in charge). "Official" things are often written down or recorded somewhere.
When is the official start date?
They tell me that I've got the job, but I don't know. They haven't sent me an official offer letter or anything.
We often compare the "official" version of something to how it actually is in reality:
My official title is "Executive Coordinator" but basically I'm a secretary.