That’ll be the day -expression in English

That’ll be the day

 Another expression with “day” in English is:

That’ll be the day

It is used to say that we don’t believe something is going to happen. If it does happen then that “day” will be a day for celebration.


  • Mike: Dad, I promise that I will get up early every day to help you in the garden.
  • Tom: Yeh, yeh! That’ll be the day! I’ll believe it when I see it!
  • Mike: Dad, please! Give me a chance to show you I’ve changed.
  • Tom: Of course Mike. Do you want me to wake you up tomorrow?

The expression “that’ll be the day” is the title of a song written and sung by Buddy Holly. There was also a film with the same name which stars David Essex and Ringo Starr

 Vocabulary Index

If you want to learn English well, look through our vocabulary sections  to find some English expressions that you like. Then try to use them when you speak or write. Do you want to look at English grammar ?


Other expressions with day:

That’ll be the day when he gets a proper job, I’m sure we’ll all celebrate. That car still works, but it has seen better days. I start my holidays in two days time. Day or date? I recognised you very easily, you don’t look a day older . 35 years old? No way, she’s 60 if she’s a day . OK, we’re all tired. Let’s call it a day. Things are going very well, but it’s early days yet. If it works out well I’ll celebrate by taking a day off . I had an accident and I have to go to the physiotherapist every other day

Go to Vocabulary Index HERE

14 Responses to “That’ll be the day -expression in English”

Read below or add a comment...

  1. Sheryll Faulker says:

    Nice post. I was checking this blog and I’m impressed! Very useful info particularly the last part 🙂 I care for such info a lot. I was seeking a good explanation for that’ll be the day for a very long time. Thank you and best of luck.

    • admin says:

      Thanks Sheryll. Have you seen the film “That’ll be the Day”? It’s a musical

  2. Mike Air Jordain says:

    I have recently started a blog, the information you offer on this website has helped me tremendously. Thanks for all of your time work.

  3. Bilety Autokarowe says:

    That is really fascinating. I have joined your feed and look ahead to in the hunt for more of your wonderful post. Additionally, I have shared your site in my social networks!

    • admin says:

      We try to post new English language and grammar material regularly every week. I’m sure you’ll find what you are looking for.

  4. Przewozy Autokarowe says:

    Does your website have a contact page? I’m having trouble locating it but, I’d like to send you an e-mail. I’ve got some creative ideas for your blog you might be interested in hearing. Either way, great website and I look forward to seeing it grow over time.

    • admin says:

      Yes, we do have a contact page. It’s on the the Content menu. If you have any problems do not hesitate to contact us again.

  5. admin says:

    Hi Michaele,

    I’m pleased you liked it