What the timeline shows
Vimshottari assigns a 120-year reference cycle to nine planetary lords. Your birth Moon’s nakshatra determines which lord is active at birth. Only the unexpired fraction of that first major period remains; the later eight major periods follow in the fixed order. Each major period is subdivided into nine antardashas in the same cycling order.
The calculator reports date arithmetic within one traditional system. It does not forecast events or claim that a period causes anything to happen. Read the formula, source text, and date convention →
Why your dates may differ elsewhere
The sidereal Moon here uses an approximate Lahiri ayanamsha, geocentric Moon longitude from Astronomy Engine, and your fixed UTC offset. A different ayanamsha, ephemeris, birth-time record, or definition of a dasha year can shift a boundary. The result flags a Moon close to a nakshatra edge and compares positions one hour either side of the input.