Because the Sun and the Moon are moving in different directions and at different speeds, it is highly significant when they are both in the same Solar Return house. While the Solar Return Sun moves three houses clockwise from one year to the next, the Moon moves counterclockwise zero to two houses each year. The Sun and the Moon are on a nineteen-year eclipse cycle. If you experience a solar eclipse on your birthday, it is very likely to occur again in nineteen year.