The Lord’s official calendar (since the creation of the heavens and the earth) has been twelve months [lunar year.] Four out of these twelve months are declared as sacred [during which certain acts of violence are forbidden.] Do not be unjust to your souls by violating these laws. However, if the disbelievers start fighting with you during these sacred month, fight with them and present a united front against them in the same manner that they put a united front against you; be sure that God is with those who respect Him.