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Be Smart

Why Are There 7 Days In a Week? Explained

Season 8 Episode 22 | 15m 14s

Why does everyone use a 7 day week, and where did it come from? Where do the names of the days come from? And who can we blame for Mondays? Here’s the true story of one of the oldest human customs still in use today. It gets a little weird.

Aired: 11/08/20
Extras
Watch • 8:32
Nature
NATURE - Season 45
Get a sneak peek at a brand new season of NATURE on PBS.
Preview: S45 | 8:32
Watch • 0:29
Nature
Preview of Sesame Street and the Great Elephant Adventure
Join Elmo and the Sesame Street gang on a once-in-a-lifetime African safari adventure.
Preview: S45 E1 | 0:29
Watch • 2:10
American Masters
American Pachuco: The Legend of Luis Valdez
Discover filmmaker and playwright Luis Valdez, a founding figure of the Chicano Movement.
Preview: S40 E6 | 2:10
Watch • 3:20
Antiques Roadshow
Appraisal: Colonial Revival Chair, ca. 1900
Appraisal: Colonial Revival Chair, ca. 1900
Clip: S30 E16 | 3:20
Watch • 1:54
Antiques Roadshow
Appraisal: 1925 Harriet Frishmuth Crest of the Wave
Appraisal: 1925 Harriet Frishmuth Crest of the Wave
Clip: S30 E16 | 1:54
Watch • 1:00
Antiques Roadshow
Appraisal: 1897 Arts & Crafts Humidor
Appraisal: 1897 Arts & Crafts Humidor
Clip: S30 E16 | 1:00
Watch • 2:01
Antiques Roadshow
Appraisal: Ming-style Reclining Chair, ca. 1900
Appraisal: Ming-style Reclining Chair, ca. 1900
Clip: S30 E16 | 2:01
Watch • 3:02
Antiques Roadshow
Appraisal: Jacob Hurd Silver Cann, ca. 1745
Appraisal: Jacob Hurd Silver Cann, ca. 1745
Clip: S30 E16 | 3:02
Watch • 2:14
Antiques Roadshow
Appraisal: Sèvres Porcelain & Gilt Bronze Urns, ca. 1870
Appraisal: Sèvres Porcelain & Gilt Bronze Urns, ca. 1870
Clip: S30 E16 | 2:14
Watch • 1:39
Antiques Roadshow
Appraisal: Baltimore Album Quilt, ca. 1850
Appraisal: Baltimore Album Quilt, ca. 1850
Clip: S30 E16 | 1:39
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