Dasa Sandhi Explorer
Compare two birth charts’ major Dasha change dates within the first 25 years after an entered marriage date. This is a sourced timeline comparison, not a marriage recommendation. Please use the historical UTC offsets at both births and confirm sensitive period boundaries independently.
Compare major-period changes
Enter two birth instants and the proposed or actual marriage date. This explorer lists pairs of Vimshottari Mahadasha changes during the first 25 calendar years after marriage when their dates fall within approximately six months of each other. It does not judge a relationship.
Method: Moon-based Vimshottari Mahadasha with the site's approximate Lahiri sidereal model, mean-plus-nutation convention and 365.25-day period year. The cited Kerala matching discussion, p. 38 mentions transitions within six months and excluding those after 25 years of marriage, while also questioning the weight placed on this factor. This explorer uses a transparent 183-day screening threshold. It does not determine malefic effects, apply other matching rules, or replace a full chart review. Birth entries are calculated in this browser and are not submitted by this form. Verify historical UTC offsets and exact boundaries.
Explore other separate factors: Porutham, Papasamyam, and the individual Dasha timeline. Read our methods and limits.