“Fasting on the Day of ‘Arafah”
On the authority of Abu Hafsah (may Allah be pleased with him) it is related that the Prophet (peace be upon him) said,
“Fasting on the day of ‘Arafah absolves the sins for two years: the previous year and the coming year, and fasting on ‘Ashura, (the tenth day of Muharram) atones for the sins of previous years.”
[Muslim]
N.B This does not mean that one can continue to commit sin in the upcoming year, rather it portrays the virtue of fasting on the day of ‘Arafah, and the blessings to be obtained therein.