Follow religious obligations according to a lunar calendar accurately and precisely .

The hadith of Abu Hurairah states that Muslims should fast when they can see the crescent moon, which marks the beginning of a new lunar month. When they can see it again at the end of that month, they should stop fasting. If it is too cloudy for them to be able to see it, then they should count that month as thirty days. This hadith teaches us about how Muslims are supposed to follow their religious obligations according to a lunar calendar rather than a solar one. It also shows us how important accuracy and precision are in following Islamic teachings correctly.