 Al-Biruni also records an "Adar Jashan" festival of fire celebrated on the intersection of Adar day (9th) of Adar month (9th), which is the last autumn month.This was probably the same as the fire festival called "Shahrevaragan" (Shahrivar day of Shahrivar month), which marked the beginning of winter in Tokarestan.In 1979, journalist Hashem Razi theorized that Mihragan the day-name festival of Mithra that in pre-Islamic times was celebrated on the autumn equinox and is today still celebrated in the autumn had in early Islamic times shifted to the winter solstice.