Allāh ﷻ swears by these ten days in the Holy Qur’ān, showing how precious they are. Whoever fasts even one day earns the reward of a full year. The Day of ‘Arafah is especially accepted for du‘ā’ and worship. Being from the ummah of the Prophet ﷺ is a gift beyond all gold and jewels. Know its worth and be thankful to Allāh ﷻ for it.