Nemesis Day

Nemesis Day is a holiday to celebrate the one in your life who you love to face off against.

Check out this list of famous nemesis pairs.

Next Nemesis Date: February 15th, 2026

Do you have a nemesis? Send them a Nemesis Note!

Still have questions? Read the FAQ

Famous Nemesises

A good nemesis makes you stronger, push harder and improve yourself. Here is a list of nemesis match ups and how they improved each other:
Fictional
Batman
⚡
The Joker
Batman learned to channel his trauma into justice, while The Joker mastered the art of turning a bad day into an entire philosophy. Together, they proved that therapy is expensive, but fighting crime in a bat suit is free.
Fictional
Sherlock Holmes
⚡
Professor Moriarty
Holmes became even sharper thanks to Moriarty, who forced him to think ten steps ahead. Moriarty, on the other hand, learned the hard way that maybe crime doesn’t pay when your nemesis is literally the smartest guy in the room.
Fictional
Harry Potter
⚡
Lord Voldemort
Harry learned the power of love and friendship, while Voldemort learned that maybe splitting your soul into seven pieces isn't a solid retirement plan.
Fictional
Superman
⚡
Lex Luthor
Superman learned that not all enemies are supervillains—some just have a lot of money and bald ambition. Lex Luthor, meanwhile, discovered that no matter how many plans he made, good hair genes weren’t one of them.
Fictional
Spider-Man
⚡
Green Goblin
Peter Parker learned that great power comes with great responsibility, and Norman Osborn learned that sometimes your biggest enemy is your own split personality—oh, and also gravity.
Non-Fictional
Thomas Edison
⚡
Nikola Tesla
Edison learned that patents win wars, while Tesla learned that having great ideas doesn’t always pay the electric bill.
Non-Fictional
Alexander Hamilton
⚡
Aaron Burr
Hamilton learned that writing non-stop is great for your legacy, while Burr learned that dueling is a terrible form of conflict resolution.
Non-Fictional
Marvel
⚡
DC Comics
Marvel learned that relatable heroes sell tickets, while DC discovered that Batman can carry an entire cinematic universe on his back.
Non-Fictional
Apple
⚡
Microsoft
Apple learned that sleek design and closed ecosystems make for loyal fans, while Microsoft realized that Excel is so powerful it can keep an entire company afloat.

Send a Nemesis Note

Send your nemesis a note of appreciation:

FAQ

The plural of nemesis is nemeses (not nemesii!).

Because it is the day after Valentine's Day and the contrast makes both sweeter.

Because 2/13 is already being celebrated as Galentine's Day.

Existence itself: Light vs Dark, Good vs Evil, Ying vs Yang, God vs Satan.

In 2011, a couple of coworkers found themselves regularly in conflict in a competitive situation. While their relationship started out contentious, it drove them both to improve their skills and in the end became friends. On Valentine's Day one of them joked: 'I hate you, will you be my anti-Valentine?' And that's how NemesisDay.com was launched.

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