Ramadhan has best 10 nights of the year, while Dhulhijjah has best 10 days of the year. Laylatul qadr is best night of the year, Arafah is best day of the year. And while we don't know when laylatul qadr is, we clearly know when the day of Arafah is. Seize the day to make plenty doa, and intend all things for Allah swt as part of our worship.