The nights of Ramadan are a time for worshipping Allah, for praying to Allah and seeking His forgiveness.
Allah knows that human beings are likely to sin, and need of an opportunity to repent and reform themselves.
Hence the month of Ramadan, a season of Du'a and Istighfar, seeking forgiveness from God the Almighty’ whereby Muslims can relieve themselves of the burden of sins.
The Du'as which follow have been taught by the Ma'sumeen (a) and show us how to seek the Forgiveness and Mercy of Allah in this month.
The following is a supplication which is recited on first day of holy fasting month of Ramadan
O Allah, on this day make my fasts the fasts of those who fast (sincerely), and my standing up in prayer of those who stand up in prayer (obediently), awaken me in it from the sleep of the heedless, and forgive me my sins , O God of the worlds, and forgive me, O one who forgives the sinners