The ancient text Surya Siddhanta calculates the Jovian year to be about 361.026721 days or about 4.232 days shorter than the Earth-based solar year.[3] This difference requires that about once every 85 solars years (~ 86 jovian years), one of the named samvatsara is expunged (skipped as a shadow year), to synchronize the two calendars.[4] However, the details of the synchronization varies slightly between the north and south Indian calendars.[5]
Particularly important for deciphering inscriptions. Must find out and implement this logic.
Looks like the problem is not as critical for south India since accuracy of saMvatsara assignment has degenerated for over a millennium (come on Southies - not again!) as per pg 37 here.
Particularly important for deciphering inscriptions. Must find out and implement this logic.