Suppose today is the twenty-ninth of Shaʿban. If the crescent is validly observed after sunset, the night begins the new month and the following daylight is the first day of Ramadan.
This does not retroactively change the daylight that has ended. The lunar date turns at sunset, while the fasting period on the following day starts at true dawn; Quduri explains fasting hours separately in the next passage.
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Kitab al-Sawm: Crescent Sighting and Establishing Ramadan
Suppose today is the twenty-ninth of Shaʿban. If the crescent is validly observed after sunset, the night begins the new month and the following daylight is the first day of Ramadan.
This does not retroactively change the daylight that has ended. The lunar date turns at sunset, while the fasting period on the following day starts at true dawn; Quduri explains fasting hours separately in the next passage.