The month of Ramadan is the ninth month of the lunar calendar and the best of months in the sight of Allah; its days are the best of days, its nights are the best of nights, and its hours are the best of hours. This month is very virtuous and is different from all other months.
The Prophet, peace and blessings of Allah be upon him, said:
شَهرُ رَمَضانَ شَهرُ اللّه عَزَّوَجَلَّ وَ هُوَ شَهرٌ یُضاعِفُ اللّهُ فیهِ الحَسَناتِ وَ یَمحو فیهِ السَّیِّئاتِ وَ هُوَ شَهرُ البَرَكَةِ؛
The month of Ramadan is the month of God, and it is the month in which God increases good deeds and purifies sins, and it is a blessed month. (Bihar al-Anwar, vol. 96, p. 340, h. 5)
The advice of the Holy Prophet (peace and blessings of Allah be upon him) to the nation is to make more efforts in this month.
The Holy Prophet (peace and blessings of Allah be upon him) said:
مَنْ صامَ شَهْرَ رَمَضانَ فَاجْتَنَبَ فیه الْحَرامَ وَالْبُهْتانَ رَضِىَ اللَّهُ عَنْهُ وَاَوْجَبَ لَهُ الْجِنانَ.
Whoever fasts during the month of Ramadan and abstains from forbidden acts and slander, God will be pleased with him and will make Paradise obligatory for him.