Must-know English Idioms About Time
1. To express that you are doing or working within the deadline or knowing that you have a deadline, here are some idioms that should be in your mind.
-beat the clock = do something within the deadline: “We managed to beat the clock and get everything finished in time.”
-work against the clock = work hard knowing you have a deadline:
“Scientists are working against the clock to come up with a new vaccine.”
-to clock on / off = sign in or out of a company to show the hours you’ve worked: “We need to clock in after we come back from lunch.”
-watch the clock (a clock watcher) = make sure you only work the hours: “If you’re a clock watcher, then this job isn’t for you.”
2. To mention the lack of time, the following will surely be the ones you need.
-pressed for time = not having much time: “I’m a bit pressed for time at the moment. Do you mind if we have the meeting tomorrow?”
-run out of time = not have any time left: “We’ve run out of time on this project.”
-a race against time = having to do something fast within a deadline: “There’s a race against time to save the rainforests.”
-no time to lose = no time to waste: “There’s no time to lose. We’ve got to get going.”
3. If you want to say that you have enough time or even a lot, you can use the following expressions.
-have all the time in the world = have plenty of time: “You don’t need to hurry. We’ve got all the time in the world.”
-have spare time = have free time: “What do you do in your spare time?”
-have time on your hands/time to kill = too much time: “We’ve got a bit of time on our hands. What do you want to do?”
-take your time = not be in any hurry: “Take your time answering the question.”
-in your own time = do something without worrying about how much time it takes: “I’ll fix the car in my own time!”
-make good time = do something faster than you thought: “We made good time. It only took us an hour to get here.” 

-time is on your side = be young and have plenty of time ahead of you:
“You’ve got time on your side, so you shouldn’t feel pressured into making a career decision now.”