Halat mein aap aksar dekhte hain Shamsi, Miladi, aur Hijri kalendaron ke baare mein. Kai logon ko nata hai in alag-alag tareeqon ko samajhna. Asl mein , yeh tamam tareeqe duniya ke khule zamaney time ki darja hain. Miladi tareeqa {goi ki | shabashme' | bas] saal ke din ki ginti par mabni hai aur Shamsi tareeqa aap ki ghiraaron ke asal par dastavez