The Vimśottarī tree to five levels. Every boundary is an exact division of its parent — the last child ends precisely where the parent does — and the year length is named because it changes the answer. Nothing entered here is stored on our servers — your browser alone remembers your last-used details.
Year length: 365.25636 days (meanSiderealDrik) · running now: Jupiter → Ketu → Saturn → Moon
Moon
1983-12-04 → 1984-10-03
Mars
1984-10-03 → 1985-05-04
Rahu
1985-05-04 → 1986-11-03
Jupiter
1986-11-03 → 1988-03-04
Saturn
1988-03-04 → 1989-10-03
Mercury
1989-10-03 → 1991-03-05
Ketu
1991-03-05 → 1991-10-04
Venus
1991-10-04 → 1993-06-04
Sun
1993-06-04 → 1993-12-03
Boundary times are root-found and residual-verified, never interpolated. Change the convention and these numbers change — which is why it is printed beside them.