I thought it is your birthday. vs I thought it was your birthday.

Both phrases are correct, but they are used in different contexts. "I thought it is your birthday." is incorrect because the verb "thought" should be followed by the past tense "was" to match the past tense of the thought. Therefore, the correct phrase is "I thought it was your birthday." when referring to a past belief or assumption.

Last updated: March 23, 2024 • 9866 views

I thought it is your birthday.

This phrase is incorrect. The verb "thought" should be followed by the past tense "was" to match the past tense of the thought.

Incorrect. Use the past tense "was" instead of "is" to match the past tense of the verb "thought."

Show examples from the web [+]

No, 'cause I thought it was my birthday.
It's possible that some people thought it was your birthday.
"It is your birthday," period.
Mr von Habsburg, you received congratulations yesterday, but I believe it is your birthday today, and that gives me the opportunity to congratulate you once more most sincerely.
Some of the other board members were saying tomorrow is your birthday.
I know enough to know that today is your birthday.
He said the code is your birthday.
He said the code is your birthday.
I thought we'd still be at your birthday.
I thought you said yesterday was your birthday.
And it is your birthday, so we're allowed to splurge a little bit, right?
Bet your ATM code is your birthday.
Do not be sad today, 'cause today is your birthday.
I sent my driver to dinner because I thought I'd be at the party ringing in your birthday.
I thought it was Alan's birthday.
I thought it would be nice for us to be together as a family on my birthday.
She was off alone because she thought we forgot her birthday.
I thought for your birthday I'd give you a ride home.
I thought your birthday would be a suitable time.
Today is your birthday is first.

I thought it was your birthday.

This phrase is correct and commonly used when referring to a past belief or assumption.

Correct. Use the past tense "was" after the verb "thought" to indicate a past belief or assumption.

Examples:

I thought it was your birthday, but I was mistaken.
She thought it was your birthday, so she bought a gift.
They thought it was your birthday, that's why they organized a surprise party.
He thought it was your birthday, so he sent you a card.
We thought it was your birthday, but we got the date wrong.

Show examples from the web [+]

It's possible that some people thought it was your birthday.
I told 'em it was your birthday.
You could've just told me it was your birthday.
You have to thank Amador, Laurita. I told him it was your birthday.
I had no idea it was your birthday.
Naturally I told her it was your birthday.
Naturally I told her it was your birthday.
No, 'cause I thought it was my birthday.
I thought you said yesterday was your birthday.
The only reason why I got that DUI is 'cause it was your birthday.
Well, Charlie, when we thought it was your birthday... we went through your dream book and we tried to re-create some of the stuff we found in there.
I heard it was your birthday yesterday.
Max said it was your birthday, so...
I HEARD IT WAS YOUR BIRTHDAY, SO I THOUGHT I'D FLY BY AND BRING YOU SOMETHING SPECIAL.
If I'd known it was your birthday, I would've got you a present.
If I'd known it was your birthday, I'd have got you a present.
I knew it was your birthday, so I wanted to surprise you.
I didn't know it was your birthday and I've got no money.
It was your birthday... and you ate too much.
Said you didn't get out much, and it was your birthday and all.

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I thought it is your birthday. vs I thought it was your birthday.