We've all forgotten birthdays before - but not many people have forgotten the day their own child was born.

Well, one mom has now revealed that she has been celebrating her son's birthday on the wrong date for the last two years.

The mortified mother took to TikTok to share her blunder with her 1.3 million followers.

Emily Vondy - who goes by @thevondyfam on the platform - posted a video explaining the situation last week.

"Here’s a little story to allow all the moms of littles out there to maybe feel a little better about yourself," she began, before launching into what had happened.

Check out her hilarious video below:

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She continued: "I just got off the phone with our pediatrician, and she's trying to bill our last visit to the insurance company. Per my words, my son's birthday is the 26th. I am his mother. I know his birthday."

Despite Emily's insistence, the insurance company was saying that her son's birthday was in fact a day earlier on February 25.

The mom's immediate reaction was to ring up the company and give them a piece of her mind. But before she let them have it, Emily thought she had better just double-check.

"Maybe I should scroll back on Facebook to look at the birth announcement years ago - to make sure," she said.

"His birthday is in fact the 25th," Emily announced, even showing a screenshot of his birth post for proof.

"For two years I’ve been celebrating his birthday on the 26th," she exclaimed with her face in her hands. "And now I have to call my pediatrician back and say 'hahaha, you know what - I had my kids birthday wrong.'"

She then hilariously added: "You want to know the worst part? It’s my middle child."

Emily ended the video by saying she now has a mommy date with her middle child, before shouting: "I love my kids!"

"They may not have their birthday celebration on the correct day but they celebrate it the next."

The video - which has racked up over 3.5 million views - certainly made other parents feel better, as they took to the comments section to share their own blunders.

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"I got flustered one day when someone said I had a handsome baby boy and asked his name. I said Ron. Her name is Harper. It’s hard out here," wrote one user.

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"I spelled my OWN NAME wrong on my child’s birth certificate," added another.

"Hand painted a plaque with footprints for 2/24/09. He was born on the 23rd," commented a third hapless parent.

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Parents, it really is true what they say; there is no manual to this parenting malarkey!

Featured Image Credit: Romans Klevcovs / Alamy

Mom shares how she found out she'd been celebrating her son's birthday on the wrong day