Happy Equals-Minus Day! Three equals twenty-nine minus twenty-six.
3.29.26: Happy Equals-Minus Day! #MathyDay
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#MathyDay
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Happy Equals-Minus Day! Two equals twenty-eight minus twenty-six
2.28.26: Happy Equals-Minus Day! #MathyDay
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Happy Plus-Equals Day! Two, plus twenty-four, equals twenty-six
2.24.26: Happy Plus-Equals Day! #MathyDay
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Happy Arithmetic Progression Day! 2 plus 12 equals 14, and 14 plus 12 equals 26
2.14.26: Happy Arithmetic Progression Day! #MathyDay
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Happy Times-Equals Day! Two times thirteen equals twenty-six.
2.13.26: Happy Times-Equals Day! #MathyDay
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Happy Concatenation-Equals Day! Concatenating 2 and 6 yields 26.
2.6.26: Happy Concatenation-Equals Day! #MathyDay
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1.26.26: Happy Times-Equals Day! 1 times 26 equals 26
1.26.26 (Belated): Happy Times-Equals Day! #MathyDay
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Mathy 2026!
Mathy 2026! #MathyDay
(It's not an "i", it's an upside-down "!" for "inverse factorial"!)
#ShamelessPlug: T-shirt (listing many mathy days throughout the year) available at my Etsy shop: inspiredbymath.etsy.com
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Happy Plus-Equals Day! 12 plus 13 equals 25
Mathy 2026 t-shirt, front
Mathy 2026 t-shirt, back
12.13.25: Happy Plus-Equals Day! #MathyDay
I'll take the opportunity to slip-in another #ShamelessPlug for my Mathy 2026 t-shirt, available at my Etsy shop: inspiredbymath.etsy.com
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"Have a Mathy 2026" t-shirt front
Mathy 2026 t-shirt back, listing lots of mathy dates throughout the year
Happy #ShamelessPlug Day!
I've added "Mathy 2026" t-shirts to my Etsy shop.
inspiredbymath.etsy.com
The back lists over forty mathy dates (in MDY format ... sorry DMY-ers!). Buy one of these, and you can ignore my #MathyDay posts for a full year.
Thanks for your support! :)
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Happy Fibonacci Day! The Fibonacci sequence begins 1, 1, 2, 3, then 5, 8, 13 ...
11.23: Happy Fibonacci Day! #MathyDay
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Happy Arithmetic Progression Day! 11 plus 7 is 18, and 18 plus 7 is 25
11.18.25: Happy Arithmetic Progression Day! #MathyDay
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Happy Arithmetic Progression Day! 9 plus 8 is 17, and 17 plus 8 is 25.
9.17.25: Happy Arithmetic Progression Day! #MathyDay
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Happy Plus-Equals Squares Day! 9 + 16 = 25, and all three numbers are squares. We can arrange geometric squares on the edges of a 3-4-5 right triangle.
9.16.25: Happy Plus-Equals Squares Day! #MathyDay
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Happy Squares Day! 9, 9, 25, and 2025 are all perfect squares
9.9.(20)25: Happy Squares Day! #MathyDay
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Happy Squares Day! 9, 4, and both 2025 and 25, are all perfect squares
9.4.(20)25: Happy Squares Day! #MathyDay
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Happy Arithmetic Progression Day! 7 plus 9 is 16, and 16 plus 9 is 25.
(belated) 7.16.25: Happy Arithmetic Progression Day! #MathyDay
(This is how you know that I'm not a bot.)
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6.28: Happy #TauDay! #MathyDay
Here's a #digitalditty to mark the occasion.
(Apologies to the Bay City Rollers)
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