Among the great seasons of worship are the first ten days of Dhu’l-Hijjah, which Allaah has favoured over other days. It was narrated from Ibn ‘Abbaas (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “There are no days on which righteous deeds are more beloved to Allaah than these ten days.” They said: “Not even jihad for the sake of Allaah?” He said: “Not even jihad for the sake of Allaah, unless a man goes out himself for jihad taking his wealth with him and does not come back with anything.” Narrated by al-Bukhaari, 2/457
It was also narrated from Anas (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “There is no deed that is better before Allaah or more greatly rewarded than a good deed done in the (first) ten days of al-Adha.” It was said: “Not even jihad for the sake of Allaah?” He said: “Not even jihad for the sake of Allaah, unless a man goes out himself for jihad taking his wealth with him and does not come back with anything.” Narrated by al-Daarimi, 1/357; its isnaad is hasan as stated in al-Irwa’, 3/398.
It is Sunnah for the Muslim to fast on the first nine days of Dhu’l-Hijjah, because the Prophet (peace and blessings of Allaah be upon him) encouraged us to do righteous deeds in the first ten days of Dhu’l-Hijjah, and fasting is one of the best of deeds, which Allaah has chosen for Himself as it says in the hadeeth qudsi: “Allaah says: ‘All the deeds of the son of Adam are for him, except fasting, which is for Me and I shall reward for it.” Narrated by al-Bukhaari, 1805.
The Prophet (peace and blessings of Allaah be upon him) used to fast on the first nine days of Dhu’l-Hijjah. It was narrated from Hunaydah ibn Khaalid from his wife, that one of the wives of the Prophet (peace and blessings of Allaah be upon him) said: The Prophet (peace and blessings of Allaah be upon him) used to fast on the first nine days of Dhu’l-Hijjah and the day of ‘Ashoora’, and three days each month, the first Monday of the month and two Thursdays. Narrated by al-Nasaa’i, 4/205 and by Abu Dawood; classed as saheeh by al-Albaani in Saheeh Abi Dawood, 2/462.
It was reported from Abu Qutaadah (may Allaah be pleased with him) that the Messenger of Allaah (peace and blessings of Allaah be upon him) was asked about fasting on the Day of ‘Arafaah. He said, “It expiates for the sins of the previous year and of the coming year.” Narrated by Muslim.
This (fasting) is mustahabb for those who are not on Hajj. In the case of the one who is on Hajj, it is not Sunnah for him to fast on the Day of ‘Arafaah, because the Prophet (peace and blessings of Allaah be upon him) did not fast on this day in ‘Arafaah. It was narrated that he forbade fasting on the Day of ‘Arafaah in ‘Arafaah.
Day of Arafah is this Saturday and Eid on Sunday Nov 06. So Inshallah fast this Saturday, Nov 05.
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The official decision and announcement of the High Judiciary Council (HJC) of Saudi Arabia regarding the beginning of Dhul-Hijjah.
1 Dhul-Hijjah will be tomorrow, Friday 28 October 2011, and the Muslims performing Hajj will be in 'Arafah on Saturday 5 November 2011 (9 Dhul-Hijjah 1432), and the Muslim Ummah shall be celebrating 'Eed al-Adhaa on Sunday 6 November 2011, (10 Dhul-Hijjah 1432), inshaa.-Allaah.
fatwa-online.com