Praise be to Allah Ta’ala, who created time. He made some times better than others, some months, days and nights better than others, when rewards are multiplied, as a mercy towards His slaves.
“DHUL-HIJJAH” is the last month of the year. The first ten days of this month, are days chosen by Allah for Muslims. In the Quran, Allah mentioned these ten days (which may mean):
“And by oath of ten nights” [ Al-Fajir 89:2 ]

Ibn Abbas (one of the great companions of the prophet SAW) explained that the expression “ten nights” is the first ten days of Dhul-Hijjah.
In a Hadith, Abu Saeed Al-Khudri reported:
“The Chieftain [Sayeed] of the months is the month of Ramadan and the mightiest of them in sanctity [hurma] is Dhul-Hijjah”

Clearly, these days are chosen by Allah and are filled with virtues for those who are seeking them. These first ten days of the last month of the islamic year give us the opportunity, to reflect upon the past eleven months. In order for us to evaluate our past actions, rectify our mistakes and make a new beginning.
Allah Ta’ala has willed some things for His creation. He chose our father Adam as His representative on earth over Angels and Jinn, Ramadan as the best month in the year, Friday to be the best day of the week. All these choices Allah made are favours for mankind especially those who believe in Him and obey Him.
Let’s delve deeper into the virtues of these first ten days of DHUL-HIJJAH.
Ibn’Abbas reports that the Messenger of Allah (sallallaahu’alaihi wa sallam) said,
“No good deeds done on other days are superior to those done on these days [meaning the ten days of Dhul-Hijjah].” The companions asked, “O Messenger of Allah, not even jihad in the way of Allah?” He said, “Not even jihad, except for the man who puts his life and wealth in danger [for Allah’s sake] and returns with neither of them.”
[This is related by the group except Muslim and an-Nasa’i]

These ten days are a season of harvesting rewards. A time when worshipers get the most rewards out of their acts of worship.
Firstly, it is within these ten days that Allah Ta’ala granted His servant, friend and prophet Ibrahim A.S, a son. The birth of prophet Ismael took place within these ten days which resulted in the provision of one of Allah’s mercy to mankind, the well known as “ZAM ZAM” for the benefit of, not only the family of prophet Ibrahim but the entire mankind. It isThe “ZAM ZAM” water that is said to serve the purpose for whatever reason it is used.

Another great favor that Allah AZZA-WA-JALL granted mankind during these ten days is to answer the supplication of prophet Ibrahim AS. He made this supplication at Mount Arafat which Allah revealed in the Quran
“And proclaim the Hajj among mankind. They will come to thee on foot and (mounted) on every camel, lean on account of journeys through deep and distant mountain highways.”
[Noble Quran 22:27]

To this very day millions upon millions of Muslims continue to answer the call of Prophet Ibrahim (peace be upon him). Perhaps this year one of your relative or friend is among those who answer the call.

‘Amr ibn Al-‘Aas narrates, “When Islam entered my heart, I went to the Messenger of Allah and said, ‘Give me your hand so that I may pledge allegiance to you.’ The Prophet spread his hand, but I withdrew mine. He said, ‘What is wrong ‘Amr?’ I said, ‘I want to make a condition.’ ‘And what is that?’ he said. I said, ‘That Allah will forgive me.’ Then the Messenger of Allah said, ‘Did you not know that Islam wipes out what came before it, and that Hijrah wipes out what came before it and that Hajj wipes out what came before it!”
(Sahih Muslim).

This establishes the fact that when your hajj is accepted by Allah your sins are forgiven. One may ask about those who are financially incapable to answer the call. Allah has provided them the means through which they can attain his blessings and favors.
Anyone who fast within these ten days or the day of Arafat which is the 9th day, he/she will be rewarded as some who fast for the whole year. By making sacrifice (AUDHIYA) of an animal as ordered, Allah will forgive your sins. Yet still, if you cannot afford any of it, make an intention. Allah will reward you for your good intent.

Arafāt is one of the most blessed times in Islam because Allah frees more Muslims from Hellfire and expiates more sins on this day than any other day.
Amr ibn Shu’aib reported: The Messenger of Allah, peace and blessings be upon him, said:
“The best supplication is that which is made on the day of ‘Arafāt. The best of it is what was said by myself and the prophets before me: There is No God but Allah alone without any partners, unto him belong the dominion and all praise and he has power over all things.”
Sunan al-Tirmidhī

Today as students, or professionals or companies, we are always happy and joyful to complete a project. We can all associate with the feeling of satisfaction when the student completes his report, an engineer ends a project or a company launches a product.
A Muslim has a similar if not greater feeling as he concludes his pilgrimage (Hajj) as he stands on the same mountain our beloved Prophet Muhammad stood, when he received the final revelation confirming the completeness of the Islam as Allah stated in the Quran
“Today I have completed your religion for you, perfected my favor upon you, and have chosen Islam as your religion. (5:3)”

Muslims All over the world share the same joy and satisfaction as they break their fast on the day of Arafat.