The name Ramadan is derived from the word Ramda' (رمضاء) which means burning. The Prophet (PBUH) said: "This month (i.e. Ramadan) has been named Ramadan because it burns the sins."
Ramadan is so much virtuous that in the Quran among all months only Ramadan has been alluded to and this allusion in the book of God which has been sent to humanity for all times till the Day of Judgment shows the importance of this holy month. In hadiths Ramadan has been described as the month of God and a divine banquet in which the host is God Almighty himself. He receives his guests in this month with mercy and forgiveness. The Prophet (PBUH) said:"whoever fasts during the whole month of Ramadan, it is obligatory upon God to forgive all his sins, guarantee the rest of his life and spare him from the thirst of the day of judgment".
Among the characteristics of Ramadan is that the Quran has been revealed in this month and also the night of Qadr is in this month. The Quran says:
"The month of Ramadhan [is that] in which was revealed the Qur'an, a guidance for the people and clear proofs of guidance and criterion."
In another place it says:" Indeed, We sent the Qur'an down during the Night of Decree."
By putting these two verses together we conclude that the night of Ghadr is in the month of Ramadan.The Prophet of Islam (PBUH) talking about the virtues of Ramadan said: O People! The month of God has come to you with mercy and blessings and forgiveness, a month which is the best of months and its days are the best of days and its nights are the best of nights and its hours are the best of hours. It is a month in which you have been invited to God's banquet and have become of those whom God honors. Your breaths in it are glorification of God and your sleep in it is worship. Your deeds are accepted and your prayer is fulfilled, so ask God with honest intentions and pure hearts to help you succeed in fasting and reciting the Quran in it.
 Allamah Majlisi, Bihar al-Anwar, Al-Wafa' Institute, Bairut, Vol. 55, p. 341, إِنَّمَا سُمِّیَ رَمَضَانَ؛ لأَنَّهُ یَرْمُضُ الذُّنُوبَ.
 Shaikh Hurr Amili, Wasa'il al-Shi'a, Al al-Bait Institute, Qom, Vol. 8, p. 99, مَنْ صَامَهُ كُلَّهُ اسْتَوْجَبَ عَلَى اللَّهِ ثَلَاثَةَ أَشْیَاءَ مَغْفِرَةً لِجَمِیعِ مَا سَلَفَ مِنْ ذُنُوبِهِ وَ عِصْمَةً فِیمَا بَقِیَ مِنْ عُمُرِهِ وَ أَمَاناً مِنَ الْعَطَشِ یَوْمَ الْفَزَعِ الْأَكْبَر.
 Bagharah: 185, شَهْرُ رَمَضَانَ الَّذِی أُنزِلَ فِیهِ الْقُرْآنُ هُدًى لِّلنَّاسِ وَبَیِّنَاتٍ مِّنَ الْهُدَىٰ وَالْفُرْقَانِ.
 Qadr: 1, إِنَّا أَنزَلْنَاهُ فِی لَیْلَةِ الْقَدْرِ.
 Shaikh Saduq, Al-Amali, Ketabchi Publications, Tehran, p. 93, أَیُّهَا النَّاسُ إِنَّهُ قَدْ أَقْبَلَ إِلَیْكُمْ شَهْرُ اللَّهِ بِالْبَرَكَةِ وَ الرَّحْمَةِ وَ الْمَغْفِرَةِ شَهْرٌ هُوَ عِنْدَ اللَّهِ أَفْضَلُ الشُّهُورِ وَ أَیَّامُهُ أَفْضَلُ الْأَیَّامِ وَ لَیَالِیهِ أَفْضَلُ اللَّیَالِی وَ سَاعَاتُهُ أَفْضَلُ السَّاعَاتِ هُوَ شَهْرٌ دُعِیتُمْ فِیهِ إِلَى ضِیَافَةِ اللَّهِ وَ جُعِلْتُمْ فِیهِ مِنْ أَهْلِ كَرَامَةِ اللَّهِ أَنْفَاسُكُمْ فِیهِ تَسْبِیحٌ وَ نَوْمُكُمْ فِیهِ عِبَادَةٌ وَ عَمَلُكُمْ فِیهِ مَقْبُولٌ وَ دُعَاؤُكُمْ فِیهِ مُسْتَجَابٌ فَاسْأَلُوا اللَّهَ رَبَّكُمْ بِنِیَّاتٍ صَادِقَةٍ وَ قُلُوبٍ طَاهِرَةٍ أَنْ یُوَفِّقَكُمْ لِصِیَامِهِ وَ تِلَاوَةِ كِتَابِه.