Zameena mein aap aksar dekhte hain Shamsi, Miladi, aur Hijri kalendaron ke baare mein. Aksar logon ko lagta hai in sabhi tareeqon ko samajhna. Asl mein , yeh har tareeqe duniya ke hisse mein mahqoom time ke ansaar hain. Miladi tareeqa {goi ki | shabashme' | bas] saal ke dinon ki ginti par mabni hai aur Shamsi tareeqa suraj ke ghiraaron ke asal par