When does the time for standing at 'Arafah begin and when does it end?

Question : Honorable Shaykh, many of the brothers ask about when the time for standing begins and when it ends?

Answer : The time for standing ends with the appearance of the dawn on the Day of Sacrifice. This is based on the saying of the Prophet (peace and blessings be upon him) "Whoever catches up," and as for its beginning, it was said that it begins from the passing of the sun at its zenith on the ninth day, and it was said that it begins from the appearance of the dawn on the ninth day. The majority of scholars hold the first opinion, meaning that it begins from the passing of the sun at its zenith on the ninth day. Based on this, if a person stands at 'Arafah before the sun passes its zenith and then leaves before the zenith,
his Hajj is valid according to the opinion of those who hold that standing begins from the appearance of the dawn, and it is not valid according to the opinion of those who hold that standing does not begin until the sun passes its zenith. For this reason, a person should be cautious, or rather it is obligatory for a person to be cautious and not have his standing except...