Du'as for Ramadan

Du'a for Fasting

When beginning the fast

وَبِصَوْمِ غَدٍ نَّوَيْتَ مِنْ شَهْرِ رَمَضَانَ

Wa bisawmi ghadinn nawaiytu min shahri ramadan

(I intend to keep the fast today in the month of Ramadan)
[abu Dawud]

When breaking the fast

اللَّهُمَّ اِنِّى لَكَ صُمْتُ وَبِكَ امنْتُ وَ عَلى رِزْقِكَ اَفْطَرْتُ

Allahumma inni laka sumtu wa bika aamantu wa 'ala rizq-ika aftarthu

(O Allah!  I fasted for You and I believe in You and I break my fast with Your sustenance)
[abu Dawud]

OR

ذَهَبَ الظَّمَأُ وَ ابْتَلَّتِ الْعُرُوقُ، وَ ثَبَتَ الأجْرُ إنْ شَاءَ اللَّهُ

dhahabadh-dhama'u wab-tallatil 'urūūqi, wa thabatal arju inshaAllah

(The thrist is gone, the veins are moistened and the reward is confirmed, is Allah Wills)
[abu Dawud 2:306]

At the end of taraweeh prayers

سُبْحَانَ ذِى الْمُلْكِ وَ الْمَلَكُوْتِ سُبْحَانَ ذِى الْعِذَّْْةِ وَ الْعظْمَةِ وَ، الْهَيْبَةِ وَ الْقُدُرَةِ ، وَالْكِبْرِيَآءِ وَ الْجَبْرُتِ، سُبْحَانَ الْمَلِكِ الْحَىِّ الَّذِىْ لايُنَامُ وَ لا يَمُوُتُ، سُبُّوحٌ ، قُدُّوْسٌ، رَبُّ الْمَلَئِكَةِ وَ الرُّوُحِ لَآ اِلهَ اِلَّا اللَّهُ نَسْتَغْفِرُ اللَّهُ ، نَسْئَلُكَ الْجَنَّةَّ وَ نَعُوُذُ بِكَ مِنَ النّارِ

Subhana dhil Mulki wal Malakuti,  Subhana dhil izzati wal aDhmati wal haybati wal Qudrati, wal kibriyaa'i wal jabaroot Subhanal Malikil hayyil ladhi, la yunaamu wa la yamūtu,  Subbuhun,  Quddusun, Rabbul malaa'ikati war-rooh La ilaha illal lahu, nustugfirullahi nas 'alukul jannati, wa na udhubika min an-naar
 

( Glory be to the master of this world and that of the heaven; Glory be to the possessor of honour, Greatness, Awe, Dominion, Majesty, and Might;
Glory be to the Ever Living Sovereign, Who neither sleeps, Nor dies,
O all Glorious, All Holy one, Our lord and the Lord of the Angels, And the soul.
There is no God but You, Forgive us,  Grant us Paradise, and save us from (hell) fire.)


Upon breaking the fast in someone's home

أفْطَرَ عِنْدَكُمُ الصَّائِمُونَ، وَ أَكَلَ طَعَامَكُمُ الأبْرَارُ، وَ صَلَّتْ عَلَيْكُم ُ الْمَلائِكَةُ

Aftara 'indakumus saa'imuna, wa akala ta'aamakumul-abraaru, wasallat 'alaikumul mala'ikat

(May those who are fasting break their fast in your home, and may the dutiful and pious eat
your food and may the angels send prayers upon you.)
[abu Dawud 3:367, ibn Majah 1:556, an Nasa'i]

On Lailatul Qadr - the Night of Power

Aishah (radhiya Allahu Ta'ala anha), that she said: "O Messenger of Allah! What if I knew which night Lailatul-Qadr was, then what should I say in it?" He said 'Say
Allahumma innaka 'affuwwun tuhibbul 'afwa fa'fu 'anni' "

(O Allah You are The One Who pardons greatly, and loves to pardon, so pardon me.)
[at Tirmidhi]