Aaj kal aap aksar sunte hain Shamsi, Miladi, aur Hijri tareeqon ke baare mein. Aksar logon ko mushkil lagta hai in tamam tareeqon ko samajhna. Asl mein , yeh tamam tareeqe duniya ke hisse mein mahqoom time ki darja hain. Miladi tareeqa {goi ki | shabashme' | bas] saal ke dinon ki sankhya par mabni hai aur Shamsi tareeqa aur ghiraaron ke rehne par