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 → Jupiter
Rahu
1999-09-15 → 1999-09-16
Jupiter
1999-09-16 → 1999-09-18
Saturn
1999-09-18 → 1999-09-19
Mercury
1999-09-19 → 1999-09-21
Ketu
1999-09-21 → 1999-09-21
Venus
1999-09-21 → 1999-09-23
Sun
1999-09-23 → 1999-09-23
Moon
1999-09-23 → 1999-09-24
Mars
1999-09-24 → 1999-09-25
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.