Your birth Nakshatra determines your starting Dasha. The Moon's position in a specific Nakshatra at birth sets the initial Mahadasha. The remaining portion of that Dasha depends on how far the Moon has traversed in that Nakshatra.
Dasha Periods FAQ
Your birth Nakshatra determines your starting Dasha. The Moon's position in a specific Nakshatra at birth sets the initial Mahadasha. The remaining portion of that Dasha depends on how far the Moon has traversed in that Nakshatra.