There is no specific du‘aa’ for each day and night of Ramadan

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Check below answers in case you are looking for other related questions:
Du’aa’ of the fasting person when breaking his fast
Weakness of a hadeeth about the virtues of Ramadaan

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Related Answers:
Time of du’aa’ when breaking fast
He wants to pray to Allah to let him live until he witnesses the descent of ‘Eesa (peace be upon him) at the end of time
“His knowledge of my situation is sufficient asking”
Du’aa’ of the fasting person when breaking his fast
Weakness of a hadeeth about the virtues of Ramadaan

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