The base year (year zero) of the Saka era used by some Hindu calendars. It begins near the vernal equinox for the civil solar calendar, but begins opposite the star Spica for the traditional solar calendar.
The SakaEra is used by the Indian national calendar, a few other Hindu calendars, and the Cambodian Buddhist calendar—its year zero begins near the vernal equinox of 78.
Paul Pezon supports this theory, claiming that the Saka Scythians and the seemingly related Cimmerians were ultimately ancestors to the Celts and Germans, and that the Germans fled the Baltic area when it was flooded by the rising sea level after the Ice age.
The Buddha Gotama was recorded of being of the tribe of the Sakas, his father being a king of the Kshatriya caste.
The philosophical reason is that the fewer the number of eras employed to explain the inscriptions, the simpler the solution, and it is a general principle that the simplest solution is usually the best.
The first dates are in the Azes era (red) and Greek (green) in the North, the Sakaera in the West (olive green) and the use of regal years (fl), in the south.
For example, inscriptions are attributed to the Sakaera both in West India and in the Gangetic region.