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Mewa

Mewa means "Mole" or birthmark.
Mewa's are arranged in a magic square of three rows and three colums where all rows, colums and diagonals form a count of 15. Each Mewa has an association with a direction a color and an element.

1 North White Metal
2 Soutwest Black Water
3 East Blue Water
4 Southeast Green Wood
5 Center Yellow Earth
6 Northwest White Metal
7 West Red Fire
8 Northeast White Metal
9 South Red Fire

The position of the Mewa changes every year/month and day in the sequence 123556789.

A complete Mewa Sign Element cycle takes 180 years (metreng) and consists of a Top, Middle and Bottom each a cycle of 60 years (rabjung).
E.g.
1804 - 1863, 1984 - 2043 bottom cycle
1864 - 1923, 2044 - 2103 top cycle
1924 - 1983, 2104 - 2163 middle cycle
The Tibetan Birth Mewa cycle begins in the year of the Mouse as in the Chinese astrology. Every year, besides his birth Mewa also has a Vitality or life force Mewa, a Power or Wealth Mewa, a Body Mewa and a Wind Horse or Luck Mewa.

Once you know the birth Mewa it is easy to find the Vitality, Power and Body Mewa.
The Mewa sequence is a repeating sequence of 123456789.
Assume the birth Mewa is Green 4 ( 1942 Water - Horse ) for the following examples.
The Vitality Mewa is the Mewa which position is 4 places before the birth Mewa.
Than the life force Mewa is White 1. Start with a count of 1 at the birth Mewa.
The Power Mewa or Wealth Mewa is 4 positions after the birth Mewa.
Than the Power Mewa is Red 7. Start with a count of 1 at the birth Mewa.
The Body Mewa is easy as this is the same as the birth Mewa. So Green 4.

The Luck Mewa is more difficult to find.
1. First look after the birthyear sign to find the key for the next step.
2. For a Tiger, Horse or Dog the next step starts with Metal - Monkey
For a Pig, Sheep or Rabbit the next step starts with Fire - Snake
For a Bird, Ox or Snake the next step starts with Water - Pig
For a Mouse, Dragon or Monkey the next step starts with Wood - Tiger
3. Find the year in the same cycle as the birthyear with the key found in the previous step.
4. The Mewa for this year is the Luck Mewa.

E.g.
1. 1942 Water - Horse
2. Key is Metal - Monkey
3. Metal - Monkey in same cycle is 1980
4. Mewa 1980 is Black 2