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.

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. This fits the Jewish program, for everything Jesus says regarding the nation of Israel, including His Second Coming and the gathering of the elect, is not Church language. The survivors of the Tribulation will see Him coming in the clouds with power and great glory, and He will send His angels with a great sound of a trumpet to gather His elect from the four winds. Peter in Acts chapter 2 is in perfect accord with this Jewish program.

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.