Equinox
The time of the year when day and night are each 12 hours long and the Sun is at the midpoint of the sky.
This happens twice a year:
• Spring equinox
• Fall (Autumn) equinox
Equinox happens around March 21 and around September 21 each year.
See this animation for why it happens:
See: Solstice
- modulo operation
- modulus
- moire pattern
- monic polynomial
- mono-
- monomial
- month
- mortgage
- multiple
- multiplicand
- multiplication
- multiplication tables
- multiplicative identity
- multiplicative inverse
- multiplier
- multiply
- mutually exclusive events
- mutually prime
- nano-
- natural logarithm
- natural number
- nautical mile
- negative
- net
- net income