30

Giordano Bruno was obsessed with the number 30. I thought I'd check into what 30 means today.

• Used (as –30–) to indicate the end of a wire story.
• The number of days in the months April, June, September and November (and in unusual circumstances February - see February 30)
• The total number of major and minor keys in Western tonal music, including enharmonic equivalents
• The minimum age for United States Senate candidates
• In years of marriage, the pearl wedding anniversary
• The duration in years of the Thirty Years' War - 1618 to 1648.
• The code for international direct dial phone calls to Greece
• The house number of 30 St Mary Axe (The Gherkin)
• The designation of Interstate 30, a freeway that runs from Texas to Arkansas
• The designation of U.S. Route 30, a highway that runs from Oregon to New Jersey
• Various other routes have been numbered "30"; for example, New York State Route 30 which runs from the Pennsylvania border to the Canadian border
• The designation of E30, the European route from Cork to Samara
• The number of tracks on The Beatles' eponymous album, usually known as The White Album
• A stage in young adulthood
• Part of the name of:
o 30 Odd Foot of Grunts, the band fronted by actor Russell Crowe
o The movie title 13 Going on 30, starring Jennifer Garner
o The title of the Food Network show 30 Minute Meals
• The uniform number of Maury Wills when he played for the Los Angeles Dodgers.
• Judas Iscariot betrayed Jesus for 30 pieces of silver. Matthew 26:15.
• The number of the French department Gard
• Slang for pornography due to its representation as Roman numeral XXX.