Shanbeh (Persian: شنبه) is the name of the first day of the week in the Jalaali calendar, mainly used in Iran. It is equivalent to Saturday in the Gregorian Calendar.
The name of the rest of the days of the week are: Yek-shanbeh = Sunday (یکشنبه); Do-shanbeh = Monday (دوشنبه); Se-shanbeh = Tuesday (سهشنبه); Chahar-shanbeh = Wednesday (چهارشنبه); Panj-shanbeh = Thursday (پنجشنبه); Adineh = Friday (آدینه). (Note: Yek = One; Do = Two; Se = Three; Chahar = Four; Panj = Five) (Note: Jom'eh also means Friday.)
The modern Turkish names of Wednesday and Thursday, çarşamba and perşembe, are derived from the shanbeh system.
References
Shanbeh Wikipedia(Text) CC BY-SA