25 But do you ask exactly at what hour the sun failed? Was it the fifth hour, or the eighth, or the tenth? Tell, O Prophet, the exact time thereof to the Jews, who are unwilling to hear; when shall the sun go down? The Prophet Amos answers, And it shall come to pass in that day, says the Lord God, that the sun shall go down at noon (for there was darkness from the sixth hour;) and the light shall grow dark over the earth in the day. What sort of season is this, O Prophet, and what sort of day? And I will turn your feasts into mourning; for this was done in the days of unleavened bread, and at the feast of the Passover: then afterwards he says, And I will make Him as the mourning of an Only Son, and those with Him as a day of anguish; for in the day of unleavened bread, and at the feast, their women were wailing and weeping, and the Apostles had hidden themselves and were in anguish. Wonderful then is this prophecy.
Source: Catechetical Lectures (New Advent)