The Day of Arafat is the most significant day of the Islamic year and the pinnacle of Hajj. The Prophet (peace be upon him) said: 'The best supplication is the supplication on the Day of Arafat, and the best thing that I and the prophets before me said is: La ilaha illallahu wahdahu la sharika lah, lahul-mulku wa lahul-hamdu wa huwa ala kulli shay'in qadir.' This dhikr should be repeated abundantly throughout the day.
Beyond this specific dhikr, the Day of Arafat is the time for the most personal, heartfelt, and urgent supplications. Ask Allah for everything — forgiveness, guidance, health, provision, protection of your family, success in this life and the next. There are no required set duas for Arafat; the most powerful prayers come from a sincere and broken heart. Make dua in your own language so you can express yourself deeply. Cry if you can — the Prophet (peace be upon him) said that Allah descends to the lowest heaven on this day and boasts to the angels about the pilgrims.
Practical tips for maximizing your Arafat experience: after combining Dhuhr and Asr prayers, spend the entire afternoon until sunset in continuous worship. Alternate between dua, dhikr, Quran recitation, istighfar (seeking forgiveness), and salawat (blessings upon the Prophet). Face the Qiblah and raise your hands when making dua. Prepare a written list of duas before the day so you do not forget anything important. Stay hydrated and in shade to maintain your energy for this marathon of worship.