What happens to the sun and moon at the end of the tribulation?

At the end of the tribulation, in its final hours, the sun and the moon will be affected. The survivors will then see the Son of Man coming in the clouds of heaven with power and great glory at His Second Coming, and He will send His angels with a great trumpet to gather His elect from the four winds.

Les explains that as soon as the tribulation has run its course, part and parcel of those final hours will be that the sun and the moon are going to be affected. He emphasizes that everything Jesus says in this context is regarding the nation of Israel, with no Church language. The survivors of the tribulation will see Him at His Second Coming—the Son of Man coming in the clouds of heaven with power and great glory. He shall send His angels with the great sound of a trumpet, and they shall gather together His elect from the four winds, from one end of heaven to the other.

When will the sun and moon be affected in relation to the Tribulation?

The sun and moon will be affected as soon as the Tribulation has run its course. This will occur during the final hours of that period, part and parcel of its closing events. It is not a separate event but is integrated into the conclusion of the Tribulation.