Annual observance

World Rat Day

April 4 Pets / Animals Updated 2026-07-10

The Obscure Holiday Calendar app highlights World Rat Day 🐀 with polished artwork, notifications, and one-tap sharing.

Overview

World Rat Day is celebrated annually on April 4th, established in 2002 by rat enthusiasts in the USA. It aims to recognize and appreciate rats as intelligent, clean, and social companion animals, challenging common misconceptions and promoting responsible pet ownership. The day encourages people to learn more about these often misunderstood creatures and celebrate their unique qualities.

Why it matters: World Rat Day, observed on April 4, highlights the intelligence and social nature of rats, fostering a greater appreciation for these often-misunderstood pets. By promoting responsible ownership and awareness, the holiday challenges stereotypes and encourages a deeper understanding of the unique qualities that make rats valuable companions.

Origin and story

Rats are highly intelligent and can be trained to learn their names, perform tricks, and navigate complex mazes.

They are very social animals, forming strong bonds with their cage mates and human companions, and often display empathy towards others.

Quick facts

  • DateApril 4
  • TypePets / Animals
  • Great forPet parents, Shelters, Veterinarians

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Ways to celebrate

Rats have an unfairly bad reputation — and a Belgian nonprofit called APOPO has spent decades quietly proving the opposite, training African giant pouched rats to save human lives.

Meet the HeroRATs

APOPO's rats are trained to sniff out landmines and tuberculosis using their extraordinarily sensitive sense of smell. A HeroRAT can clear a tennis-court-sized minefield in about 30 minutes — a job that takes a human deminer with a metal detector up to four days.

Learn about their TB detection work

The same rats can screen 100 sputum samples for tuberculosis in 20 minutes, versus up to four days by microscopy. Read about Carolina, one of APOPO's real HeroRATs, and the thousands of TB cases and landmines the program has helped identify.

Give a pet rat some appreciation

If you or someone you know keeps pet rats, spend some extra time with them today — they're highly social, intelligent animals capable of far more than their reputation suggests.

Helpful resources: Carolina the Giant Rat Retires as a Hero After Saving Many Lives (National Geographic)

Fun facts

  • Rats are highly intelligent and can be trained to learn their names, perform tricks, and navigate complex mazes.
  • They are very social animals, forming strong bonds with their cage mates and human companions, and often display empathy towards others.
  • Despite popular belief, pet rats are meticulously clean creatures, spending several hours a day grooming themselves and their companions.

Sources and attribution

External links may lead to third-party websites.


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FAQ

When is World Rat Day?
It is observed on April 4 each year.
What is World Rat Day?
World Rat Day is celebrated annually on April 4th, established in 2002 by rat enthusiasts in the USA. It aims to recognize and appreciate rats as intelligent, clean, and social companion animals, challenging common misconceptions and promoting responsible pet ownership. The day encourages people to learn more about these often misunderstood creatures and celebrate their unique qualities.
How do people celebrate World Rat Day?
Read about APOPO's HeroRATs, African giant pouched rats trained to detect landmines and tuberculosis far faster than human methods can.

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