The number 12

1. Time
- 12 months in a year
- 12 hours in a day
- 12 hours in a night

2. Measurements
- 12 inches in a foot
- 12 feet in a yard
- 12 ounces in a pound

3. Mathematics
- 12 is a highly composite number, with 16 divisors
- 12 is the smallest number that can be divided by all the numbers from 1 to 6
- 12 is the smallest number that can be represented as the sum of two cubes in two different ways: 1^3 + 1^3 + 1^3 + 1^3 = 2^3 + 2^3

4. Astrology
- 12 zodiac signs in astrology
- 12 houses in a horoscope chart

5. Religion and culture
- 12 tribes of Israel
- 12 disciples of Jesus
- 12 labors of Hercules
- 12 Imams in Shia Islam

6. Music
- 12 tones in the chromatic scale
- 12 semitones in an octave

7. Mythology and folklore
- 12 gods of Olympus in Greek mythology
- 12 knights of the Round Table in Arthurian legend
- 12 labors of Heracles in Greek mythology

8. Miscellaneous
- 12 stars on the European Union flag
- 12 gates of the New Jerusalem in the Book of Revelation
- 12 steps in a traditional 12-step program for addiction recovery