June 28th 2023 - Holidays and Observances

 

(click on the day for details)

• Christian feast day:
  • Basilides and Potamiana
  • Irenaeus of Lyon (Western Christianity)
  • Heimerad
  • Blessed Maria Pia Mastena
  • Paulus I
  • Vincenza Gerosa
  • June 28 (Eastern Orthodox liturgics)
• Constitution Day (Ukraine)
• Poznań Remembrance Day (Poland)
• Vidovdan, celebrating St. Vitus and an important day in Serbian history. (Eastern Orthodox Church)

 

Observances (click on the day, BD, or week for details

National Insurance Awareness Day

National Tapioca Day

Anniversary of Guru Rinpoche

Christopher Street Day

Hari Raya Haji

National Climate-Smart Skin Awareness Day

National Grant Day

National Lauren Day

National Logistics Day

National Parchment Day

National Paul Bunyan Day

Sacrifice Feast Eve

Stonewall Riots Anniversary

Tabaski Day

The National Day of Joy

Vietnamese Family Day

Waqfat Arafat Day

Wimbledon

National Ceviche Day

International Body Piercing Day

Happy Heart Hugs Day

 

Mel Brooks’s Birthday

Markiplier’s Birthday

Katelyn Elizabeth’s Birthday

John Elway’s Birthday

Elon Musk’s Birthday

Diamond Strawberry’s Birthday

 

Fun Observances

 Tau Day

Tau Day, an anti-Pi Day holiday, is an unofficial observance held every year since 2010 on June 28, or 06/28 as written in the American date format.

The day began as a way to recognize tau, τ, a ratio constant describing the relationship between the circumference and the radius of a circle. In recent years, some mathematicians and physicists have argued for the replacement of pi (π) by tau.

Replacing Pi

The concept of replacing pi by tau as a better way to describe the relationship between a circle’s circumference and its radius was first brought up by mathematics professor, Bob Palais in the Mathematical Intelligencer in an article called π is wrong!. This was followed by the publishing of the Tau Manifesto by physicist Michael Hartl. Both of these articles called for the replacement of pi by tau. Tau, the ratio of a circle's circumference to its radius, is equal to 2 π or 6.283.

Not Widely Accepted

Tau is not yet widely accepted within the scientific community, though there is a large community of scientists and technologists who have called for the replacement of pi by tau.

Other Mathematical Dates

The Gregorian Calendar is full of dates that when written in a special manner represent a mathematical or scientific concept. Some of these include Yellow Pig Day, Mole Day, Fibonacci Day, Palindrome Day, and e-Day. Use our Date Pattern Calculator to find out other interesting calendar dates during the year.

How to Celebrate?

• Because the value of tau is twice the value of pi, proponents of tau day call for “twice as much of pie” and to eat circular shaped food. So, instead of one slice of pie, eat two or four.
• If you are a teacher, use this day to encourage students to get interested in mathematics and to consider mathematics as a career choice.

Did You Know…

… that Michael Hartl, called for renaming March 14 (3/14) or Pi Day to Half Tau Day?

 

 

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My husband uses scraps of wood, called "shorts," for carving. In a lumber store, he saw some lovely pieces in a bin behind the counter. But he had a lot of explaining to do after he asked the clerk,

"Do you mind if I come around and poke through your shorts?"

 

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Shortly before our 25th wedding anniversary, my husband sent 25 long-stemmed yellow roses to me at my office. A few days later, I plucked all the petals and dried them. On the night of our anniversary, I spread the petals over the bed and lay on top of them, wearing only a negligee.

As I'd hoped, I got a reaction from my husband.

When he saw me, he shouted, "Are those potato chips?"

 

 

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sandrewn