iVillage

A very clear illustration of this idea is the fact that, in most Eastern countries, birthdays are observed according to the particular day of the Moon cycle (lunar phase angle) during which a person was born, rather according to the solar return (birthday) as here in the West. If you celebrate your birthday in Nepal, you celebrate that phase of the Moon (the lunar day, solunar angle) you were born in. Moreover, due to the fact that lunar months do not fit nicely within the solar year, a birthday in the East for any given individual can be up to a month away (during some years) from the solar return—our Western-style birthday.

This simple fact makes it clear how important the Moon and the lunar cycle are in the East. A study of the existing literature on the meaning and use of the Moon in astrology (East and West) shows much similarity but also considerable difference.