How do we determine the times for Maghrib and 'Isha' prayers? Because the times vary in some regions, and they may be prolonged in certain areas such as the North and South Poles?

The questioner : ... in this country ... so what is your opinion on that? Especially in Ramadan?

The Shaykh : Yes, what came in the question ... and his statement that he is compelled to estimate, but before this estimation, one must exert effort to know the time of Maghrib and the time of 'Isha' on clear days if possible. This has a rule and a principle in the Sunnah; because you know the time of Maghrib when the sun sets, and the time of 'Isha' when the red twilight disappears. So I do not know how the conditions are here, especially, but in the North Pole and the South Pole, all of you know that there, the night lasts for days and even months, and likewise the day in some seasons. There, it is not possible to distinguish; so estimation is necessary. But ... the setting and rising may not ... the setting of the red twilight should be observed, if possible. If it is not possible, then at that time, estimation is resorted to, as stated in the question.