October 4 – National Denim Day

Posted on October 4, 2013

This is pretty cool: Lee's jeans and the American Cancer Society have teamed up to encourage companies to begin a casual-dress day at work to raise money for research on breast cancer.

It works like this: employees chip in $5 or more to fight breast cancer, and in return they are allowed to go to work in their jeans today!

Since National Denim Day began in 1996, it has raised more than $89 million to find better treatments for and diagnosis (or even prevention) of breast cancer!

What is denim?

Denim is a super sturdy fabric made of cotton twill. It's strong because the weft passes under two or more warp threads rather than just one. This gives the fabric a characteristic diagonal pattern. If you're wearing jeans right now, you can check it out.

This is normal weave, not twill.
Notice that each weft passes over
just one warp thread at a time.
What makes indigo (dark blue) denim different from other twill fabric is that only the warp threads are dyed. That's why jeans are white on the inside—and it's why jeans wear and fade in such a cool way!

To find out why denim is called denim, and why jeans are called jeans (plus other interesting facts and stats), check out this earlier post

It's fun to reuse, repurpose, and upcycle jeans and other denim items! 

Also on this date:

World Animal Day

Plan Ahead:

Check out my Pinterest boards for October holidaysOctober birthdays, and historical anniversaries in October.

And here are my Pinterest boards for November holidaysNovember birthdays, and historical anniversaries in November.

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