Zakharia 14:6

14:6 On that day there will be no light – the sources of light in the heavens will congeal. ¹ 

Zakharia 14:18-19

14:18 If the Egyptians will not do so, they will get no rain – instead there will be the kind of plague which the Lord inflicts on any nations that do not go up to celebrate the Feast of Tabernacles. 14:19 This will be the punishment of Egypt and of all nations that do not go up to celebrate the Feast of Tabernacles.

[14:6]  ¹ tn Heb “the splendid will congeal.” This difficult phrase (MT יְקָרוֹת יְקִפָּאוֹן, yÿqarot yÿqippa’on) is not clarified by the LXX which presupposes וְקָרוּת וְקִפָּאוֹן (vÿqarut vÿqippa’on, “and cold and ice,” a reading followed by NAB, NIV, NCV, NRSV, TEV). Besides the fact that cold and ice do not necessarily follow the absence of light, the idea here is that day will be night and night day. The heavenly sources of light “freeze up” as it were, and refuse to shine.