Explanation of secondary progressions in astrology

Secondary progressions is a timing technique in astrology that determines the experience for a person in each year of their life.

In secondary progressions, one starts with a birth chart and moves a birth chart forward one day for one year of life to determine the experience of that year of life.

For example, to determine the experience for a person when they are 22 years old, the birth chart should be moved forward 22 days and the progressed birth chart should be indicative of that year of life.