Abstract
The modified moon sighting model is developed from the basic moon sighting model by adopting more phases. The preference of the new model is proved by its ability to predict extra three moon phases, first quarter, last quarter and dark moon. The modified model predicts the start date of 18 lunar months, from March 2022 to July 2023. The results of the new modified model correct the results of the basic model in 3 months, Dul-Hejjah 1443 H and Safar and Rabi-Second 1444 H. The comparisons of the new model 18 results are performed against the available results of different 3 references. The improved results of the new model are concluded by achieving the highest agreement rate of 79.2% with no single odd-result. The calendar of the modified moon sighting model is presented in a new innovative format.
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