Kenji: I burned the midnight oil studying for tomorrow's exam.
Abuela Carmen: Ben, on the other hand, will finish everything against the clock, in the nick of time, same as always.
Ben: I prefer to think of it as efficient. Time flies either way.
Common mistake: “I only see a blue moon once in a blue moon.” — Correct: “I only visit my hometown once in a blue moon.”
Idioms about time and effort describe urgency, rarity or hard work using images that have nothing literally to do with clocks or moons — the meaning is entirely figurative.
Time idioms — literal image vs. real meaning
Idiom
Literal image
Real meaning
against the clock
racing a clock
working with very little time left
once in a blue moon
a rare colored moon
very rarely
burn the midnight oil
oil lamps at midnight
work late into the night
in the nick of time
an old measuring notch
just before it's too late
from scratch
starting from a mark on the ground
from the very beginning, with nothing prepared
⏱️ against the clock — working rapidly to finish before a deadline
🌙 once in a blue moon — very rarely / almost never
🕯️ burn the midnight oil — work or study late into the night
⚡ in the nick of time — at the last possible moment before disaster
🌱 from scratch — from the very beginning with no head start
🕊️ time flies — time appears to pass very rapidly
Kenji burned the midnight oil before his Spanish exam.
Ben arrived in the nick of time, as always.
Sofía built her studio from scratch.
Time flies when you're with good friends.
Ben doesn't work against the clock; he just runs out of time naturally.
Sofía doesn't burn the midnight oil often; she prefers mornings.
We didn't finish the project from scratch; we reused an old design.
Did you finish the report in the nick of time?
How often do you see snow — once in a blue moon?
Did you build this from scratch?
Did Kenji burn the midnight oil? Yes, he did.
Did Ben arrive on time? Just in the nick of time.
Does time fly when you're busy? Yes, it does.
Practice
Kenji ___ the midnight oil before his exam. (burned, cut, paid)
Ben arrived ___ time, as always. (in the nick of, once in a blue, against the)
Sofía built her studio ___ scratch. (from, against, in)
'Once in a blue moon' means very often.
'Burn the midnight oil' means to work late into the night.
Find the mistake: I only see a blue moon once in a blue moon.
Kenji studied very late into the night. — Rewrite using 'burn the midnight oil'.
Sofía started her studio with nothing prepared. — Rewrite using 'from scratch'.
Did Kenji burn the midnight oil? — Answer with a short answer (Yes).
Ben always arrives in the nick of time. — Write the negative form.
Have you ever had to work against the clock? (short answer)
Listening
Abuela Carmen: You look tired, Kenji.
Kenji: I burned the midnight oil studying for tomorrow's exam.
Abuela Carmen: Ben, on the other hand, will finish everything against the clock, in the nick of time, same as always.
Ben: I prefer to think of it as efficient.
Sofía: Efficient is building something from scratch the night before?
Ben: Time flies either way, doesn't it?
Reading
Abuela Carmen has a theory about time: some people, like Kenji, burn the midnight oil preparing for everything days in advance, just in case. Others, like Ben, seem to thrive working against the clock, somehow finishing everything in the nick of time and never a minute later. 'I built my whole business from scratch,' she tells them both, 'and I learned this: it doesn't matter which kind of person you are, as long as you finish.' She only gives this speech once in a blue moon — mostly, she says, because nobody needs to hear it twice. Time flies regardless of how you use it, she adds. Better to use it your own way.