Comparative study of  6 day's in Shiite and Sunni's orders viewpoint

There have many questions been raised on ‘6 days’ which refers to create the heaven and the earth during 6 days, and also, it refers to howness of creating them during 6 days. Meanwhile, it has been said there has not been day and night, contrasting to scientific theory, and also, it’s contrast to 9-12 verses of surah Fosselat, whatness of lack of creating in just a moment in spite of the authority to do it. This issue has been discussed by comparing Shiite and Sunni’s commentaries by a descriptive-analytic method in this paper. Findings of the present research indicated that day refers to a period of time and creating during 6 days refers to 6 steps and a long period of time by virtue of scientific evidences of creating the heaven and the earth. Most of commentators have viewed 4 days in the interpretation of the verses which refer to 8 days. They knew 2 days of creating the earth into 4 days.