Ramadan (Arabic: رمضان Ramaḍān, Arabic pronunciation: [rɑmɑˈdˤɑːn]) (also Ramazan) is the ninth month of the Islamic calendar, which lasts 29 to 30 days. It is the Islamic month of fasting, in which participating Muslims refrain from eating and drinking during daylight hours and is intended to teach Muslims about patience, spirituality, humility and submissiveness to God. Muslims fast for the sake of God and to offer more prayer than usual.
I can't see a connection between that small collection of words and doing good deeds at all :P
Charity is very important in Islam, and even more so during Ramadan. According to tradition, Ramadan is a particularly blessed time to give in charity, as the reward is 70 times greater than any other time of the year. For that reason, Muslims will spend more in charity (sadaqa), and many will pay their zakat during Ramadan, to receive the blessings (reward). In many Muslim countries, it is not uncommon to see people giving food to the poor and the homeless, and to even see large public areas for the poor to come and break their fast. It is said that if a person helps a fasting person to break their fast, then they receive a reward for that fast, without diminishing the reward that the fasting person got for their fast.
You need a specific month to do good deeds? That is one messed up religion.