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 → Rahu
Ketu
1999-12-03 → 1999-12-05
Venus
1999-12-05 → 1999-12-09
Sun
1999-12-09 → 1999-12-10
Moon
1999-12-10 → 1999-12-12
Mars
1999-12-12 → 1999-12-14
Rahu
1999-12-14 → 1999-12-17
Jupiter
1999-12-17 → 1999-12-21
Saturn
1999-12-21 → 1999-12-25
Mercury
1999-12-25 → 1999-12-28
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.