Abuelyamen, S. H. (2023). THE HIJIRI CALENDAR AND ITS CONFORMANCE WITH THE GREGORAIN CALENDAR BY MATHEMATICAL CALCULATIONS: 31st May 2022; 07th February 2023; 16th February 2023; 17th February 2023. MATTER: International Journal of Science and Technology, 9, 01–19. https://doi.org/10.20319/mijst.2023.9.0119