Approximately how many minutes after the disappearance of the red twilight does the time for Maghrib end, starting from the Adhan? And is the time between sunset and the disappearance of the twilight equal to the time between Fajr and sunrise?

The time for Maghrib extends until the disappearance of the red twilight (shafaq al-ahmar), and it varies with the different seasons of the year. If the red twilight is not clear, one can rely on approved calendars, such as the Umm al-Qura calendar. Some scholars, like Ibn Hazm, held that the time for Maghrib is equal to the time for Fajr, but Shaykh al-Islam Ibn Taymiyyah weakened this view, explaining that the two periods differ between summer and winter.