Dates may be woven into the designs of rugs. Usually the date presumed to the year that the rug was woven or presented as a gift. There is some skepticism about the reliability of the such dates because a weaver may use a much earlier date or may copy a date from an earlier rug. Please also keep in mind that most weavers of the early era were illiterates, so even with good fate mistakes were done.
The dates appear on the rugs are either Gregorian dates or Islamic dates according to the weaver