| Author(s) | Zaki A. Al-Mostafa |
| Affiliation | King Abdulaziz City for Science and Technology, Astronomy and Geophysics Research Institute, P.O. Box 6086, Riyadh 11442, Saudi Arabia |
| Title | The Universality of Um Al-Qura Calendar: The Scientific Reasons |
| Source | Journal of King Saud University. Science. Volume 17, No 2. (2005/1425) |
| Abstract | The first visibility of the moon is important. Some nations have used the lunar phase cycle as the basis for their claendars. Different societies have different methods (models), so they do not all have the same starting criterion and the first day of the lunar month may differ. This paper focusses, on the scientific reasons for the university of Um AlQura Calendar |
