The Quran explains this in a clear way...

The Quran explains this in a clear way: He it is Who made the sun a shining brightness and the moon a light, and ordained for it mansions that you might know the computation of years and the reckoning. Allah did not create it but with truth; He makes the signs manifest for a people who know. (10:5) *** *** As for the words: …as an old dry palm branch. *** *** They compare the appearance of the moon to an old withered branch of date palm curved like an arch, yellow and weak.

If you look at the moon in the last nights of the month you will find that it is exactly so. It is also like the last phase of my and your age. Repentance has much value now and not when one sees the angel of death. We have…