In the name of Allah, the merciful, the compassionate
The first day of Dhul-Hijjah, the last month in the Islamic Hijri calendar, will be on June 19, meaning that Eid Al-Adha will be on the 28th and the day of Arafah will be on the 27th.
The Day of Arafah fasting is highly encouraged and recommended for those not going on Hajj.
“Fasting on the Day of Arafah expiates the sins of the past year and the coming year.” (Muslim)
The Prophet Muhammad, peace be upon him, said of the Day of Arafah dua: “The most excellent dua is the dua on the Day of Arafah, and the best of what I and the prophets before me have said is “There is nothing that deserves to be worshipped in truth except Allah; he is Alone and has no partner, to Him belongs the dominion and to Him belongs all praise, and He is All-Powerful over all things.”
It is a Sunnah of our Prophet (PBUH) to recite the Tahleel, Takbeer, and Tahmeed as many times as possible on the day of Arafah and also on the days of Tashreeq (11th, 12th, and 13th of Dhul Hijjah).
It is necessary (wajib) for every Muslim (male or female, whether praying in congregation or alone) to say the following takbir (declaration of the greatness of Allah) immediately after each obligatory (fard) prayer from the Fajr Prayer on the 9th of Dhu’l Hijjah (the Day of `Arafah which is the day before Eid) to the Asr Prayer on the 13th of Dhu’l Hijjah (the day after the final day of Eid). Thus, these takbirs last 5 days, and 23 prayers. The takbirs: Allahu Akbar, Allahu Akbar, La ilaha illa Llahu. Wa Llahu Akbar, Allahu Akbar wa lillahi Lhamd.
Eid Al-Adha is one of the holiest and most significant occasions on the Islamic Hijri calendar.