Procrastination is the thief of time.

Procrastination is one of the best examples, which I can think of, of a word derived from Latin.  “Pro” means for and “cras” means tomorrow.  If you put something off for too long it may never get done.  This is a quotation from ‘Night Thoughts’ by Edward Young. (The Penguin Dictionary of Quotations)

Another well-known saying on the same theme is
Do not put off until tomorrow what you can do today.

There is another expression about getting around to it, as in “I’ll do it when I get around to it.”  A few years ago someone had the bright idea of making ornamental plates with the wording “A round tuit” on them!

Time flies when you’re enjoying yourself…
…and drags when you are bored.  Flies here means goes quickly.

Can you spare a minute?
Spare and minute are both interesting words.  Minute here is a noun and spare is a verb.

What do you do in your spare time?
Here spare is an adjective describing the time left aver when you have attended to all the things that are necessary for daily living.

I won’t take any more of your time
is a leave-taking expression.

Thank you for your time
s another.

Mark time.
Before people had clocks and calendars they could keep track of the passage of time by making marks.  Marking time often implies not having anything interesting or worthwhile to do.

Time and tide wait for no man.
King Canute famously discovered this!

You cannot stop the march of time.
This is often connected with progress.

About time, too.
A greeting for a late-comer?

He hasn’t the time of day for him.
He won’t even say “Good Morning” to him.

Time is a great healer.
This is a saying.  Many things take time to heal.  Of itself, I doubt that time heals.

Time will tell.
The outcome will become clear in the future.

She is having the time of her life.
She is enjoying herself more than ever before.

Take one step at a time.
This is a way of telling someone not to try to tackle a big project all at once.

Take one day at a time.
This is all anyone can do.  It often takes ill-health or other difficult circumstances to make people focus on the present.

All in good time.
I wonder whether this is a corruption of “All in God’s time”.  It is an expression encouraging patience.

Time stood still.
This sounds like a graphic way of describing a pause.  Sometimes in unusual or frightening circumstances people perceive things as if they were in slow-motion.
We measure time by the movement of the earth, indicated by the position of the sun in the sky.

There is a story in the Bible where extra time was needed for a battle to be won and the sun stood still.  It can be found in the book of Joshua Chapter 10 verses 12 to 15