The World Federation One Stop Fiqh

Ruling 1605

If someone who wants to keep a qaḍāʾ fast of Ramadan wakes up after the time of ṣubḥ prayers and finds that he has had a wet dream, and if knows that he had this wet dream before the time of ṣubḥ prayers, he can fast on that day with the intention of keeping a qaḍāʾ fast of the month of Ramadan.