The basic joint I use in geometricks has twelve elements. Here are some of the ways that I found twelve to be an important number.

12 months
12 hours of clock
12 o’clock is mid day or midnight
12 string guitar
12 days of Christmas
12 steps in AA
12 inches to the foot
12 apostles of Christ
12 primary Qi channels in acupuncture
12 constellations of the Zodiac
12 retainers of Sun god, Ra pulls him through
12 gates of the underworld
12 ordeals of Gilgamesh
12 Roman tablets of law
12 argonauts with Jason
12 books of Virgil's Aeneid
12 tribes of Israel
12 advisors to the Dalai Lama
12 knights of the round Table
12 tribe nation of Native America
12 -fold royal court of Charlemagne
12 generals surrounded George Washington
12 notes of the chromatic musical scale
12 – tone music
12 spheres will completely surround one at its center
12 gates to the city (folk song)
12 jury members
12th of Never
12 eggs in a dozen
12 grades at school
12 dots on a domino
12 spaces per side of a Backgammon board
12 monkeys (a science fiction story)
12 digits in a bar code (UPC-Universal Product Code)
12 soil classifications (US Agriculture Dept.)
12 dozen to a gross
12 “fruits of the holy ghost” - Charity, Joy, Peace, Patience, Benignity,Goodness, Long-Suffering, Mildness, Faith, Modesty, Continency, Chastity
12 parts to Boy Scout Law-Boy Scout Law. A Scout is: Trustworthy, Loyal,Helpful, Friendly, Courteous, Kind, Obedient, Cheerful, Thrifty, Brave, Clean, and Reverent.
12 earth years = one year on Jupiter
12 stars on European flag
12 days is shortest mammalian gestation period (short-nosed bandicoot, a marsupial)
12 volts in car electrical system
12 husbands of Jane Canary-11 met untimely deaths-hence her nickname, Calamity Jane
12 pence in a shilling
12 faces of a dodecahedron
12 edges of a cube or octahedron
12 vertices or corners of an ocosahedron
12 spokes to a cartwheel
12 stations of the cross
12 the ways in which Wonder Bread is supposed to build strong bodies
12th Night by Shakespeare
12 points in a pica (unit of type measurement)
12 picas to an inch
12 Angry Men (jurors in a play by Reginald Rose)
12 Mormon Apostles (also called Twelve Elders, Twelve Disciples, or Nephrite Twelve)
12 Levels of the Beaufort Scale from measuring wind speed
12 Boxing Categories (from Light Flyweight to Super Heavyweight)
12 Caesars (first twelve emperors of Rome)
12 Face Cards
12 Federal Reserve Banks
12 Historical Books of the Old Testament (books 6-17)
12 Astrological Houses (as in, "the moon is in the seventh house" which is marriage)
12 Imams (prophets recognized by the Shiite Muslims)
12 Labors of Hercules
12 Levels of the Modified Mercalli Intensity Scale (for measuring earthquakes)
12 Minor Prophets of the Old Testament (last twelve books of the Old Testament)
12 Olympians (Greek and Roman deities)
12 Softball Player positions
12 Trojan Planets (asteroids in the same orbit as Jupiter)