Ana just found out about the goodness of fasting on the 9th day of the month of hajj aka zul hijja/dhul-hijjah. It is mentioned that fasting on this particular day expiates 2 years worth of sins; the previous and the coming year. =) Hence, this fasting is mustahabb (recommended in arabic) for us who are not performing pilgrimage in Makkah; and for those who are on hajj are not encouraged/forbaded to fast on this day because the prophet (peace be upon him) did not practice fasting on the day of Arafat during pilgrimage.
and the following is a copy paste from http://www.islaam.net which ana would like to share with all brothers and sisters >>>
The month of Dhul-Hijjah is a season of worship, and seasons of worship bring along blessings, benefits and opportunities to correct one's faith and make up for shortcoming. Every one of these special opportunities involves some kind of worship, which brings the slave closer to his Lord. And Allâh bestows His blessings and Favours on whom He wills. The fortunate person is he who makes good use of these special months, days, and hours, while worshiping Allâh. He is most likely to be touched by the blessings of Allâh. [Ibn Rajab, al-Latâ'if pp. 8]
The first ten days of Dhul-Hijjah are marked blessed for both, the pilgrims and the non-pilgrims. Rewards of good deeds are multiplied in these days. Imâm Ibn Qayyim (rahimahullah) (d. 751H) said:
|“Indeed, its days are the most excellent of all the days with Allâh. It has been confirmed in Sahîh al-Bukharî from Ibn Abbas (radhi Allâhu anhu) that the Messenger of Allâh (sallAllâhu alaihi wa-sallam) said:|
The companions asked: 'Not even Jihad (fighting in Allâh's Cause)?' He (sallAllâhu alaihi wa-sallam) replied:
[Sahîh al-Bukharî vol: 2, no: 457]
And it is these ten days, of which Allâh takes an oath saying:
This is why it is recommended to increase in making Takbîr, Tahlil and Tamhid during these days.” [Zâd al-Ma'âd vol: 1, pp: 56]
Yaum al-Arafat:The 9th day of Dhul-Hijjah is the day of Arafat. It is this day when the pilgrims gather on the mountain plain of Arafat, praying and supplicating to their Lord. The day of Arafat holds great importance in Islam since this is the Day when Allâh completed his revelation on His Messenger, Prophet Muhammad (peace be upon him).