Doha: Qatar Calendar House (QCH) announced that next Friday, corresponding to Jan. 31, 2025, will be the first day of Sha'ban 1446 AH, and next Thursday, corresponding to Jan. 30, 2025, will be the last day of Rajab this year, according to accurate astronomical calculations conducted by specialists at QCH. According to Qatar News Agency, Executive Director of QCH, Eng. Faisal Al Ansari, stated that the crescent of the month of Sha'ban for the year 1446 AH will be born on Wednesday, corresponding to Jan. 29, 2025, at 15:37 Doha local time (12:37 GMT). Eng. Al Ansari further explained that the crescent of the month of Sha'ban will set four minutes before sunset on Wednesday, making it impossible to see the crescent on the evening of the day of investigation in the sky of the State of Qatar and most Arab and Islamic countries. The beginnings and ends of the Hijri months are determined by the moon's orbit around the Earth, while the Gregorian months are determined by the Earth's orbit around the sun, as per a stronomical constants.