When does the time for Fajr, Duha, and Maghrib prayers end, specified by the hour?

The time for the 'Isha prayer begins from the disappearance of the red twilight until one-third or half of the night, which is an optional time. Its necessary time extends until Fajr.

The time for the Duha prayer begins from the sun's elevation by the measure of a spear until just before zawal (midday).

As for the time for the Maghrib prayer, it begins with sunset and extends until the disappearance of the red twilight.

Prayer times are calculated based on the movement of the sun, which varies with the seasons of the year, and the criterion is direct observation.