This comment " bunch of idiots" shows how naive you are and unaware of multiple updates in Suryasidhanta.

Narayanan (2011) showed that for determining the Sun’s longitude, the pulsating Indian epicycle is far more accurate than the Greek eccentric-epicycle model and that the pulsating Indian epicycle for the Sun becomes progressively more accurate as one goes back in time. Peak accuracy, of about 1 minute of arc, is reached around 5200 BCE.

Dr. Narayanan carried out extensive simulations by varying 1. Time (which includes proper motion),2. Ecliptic Obliquity, 3. Ecliptic Node location and 4. Vertical motion of the ecliptic. We summarize his results. Several matches were obtained in the timeframe 7300 BCE – 7800 BCE.