Jupiter takes approximately 12 years to complete one orbit around the Sun, spending about one year in each zodiac sign. This creates a 12-year cycle of expansion and growth.
Your "Jupiter Return" occurs around ages 12, 24, 36, 48, 60, etc., marking periods of opportunity, growth, and good fortune. Many people experience significant life expansion during these years.
In Chinese astrology, this 12-year cycle also corresponds with the 12 animal signs, creating an interesting overlap between Eastern and Western systems.