Guru Peyarchi is associated with horoscope and astrology and is the transition of planet Guru or Jupiter. In 2010, Guru Peyarachi date is November 22. Guru or Jupiter will move from Capricorn (Magar Rashi) to Aquarius (Kumbha Rashi) on this day and will remain there for next 12 months.
Guru or Jupiter is considered a highly favorable graha or plant and it is believed to bring luck and prosperity. But those people with weak position of Jupiter in their horoscope might face some hard times.