to disregard the observation of the sacred months and to observe it during the nonsacred months is to add more to ones disbelief. this causes the unbelievers to go further astray. one year they consider a sacred month not sacred but the next year they consider it sacred at the right time. by dealing with the sacred months in such a manner they think that they have observed the laws of god but in fact they have changed them. their evil deeds seem attractive to them but god does not guide the unbelieving people.
إنما النسيء زيادة في الكفر يضل به الذين كفروا يحلونه عاما ويحرمونه عاما ليواطئوا عدة ما حرم الله فيحلوا ما حرم الله زين لهم سوء أعمالهم والله لا يهدي القوم الكافرين