عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: مَا كُنْتُ أَقْضِي مَا يَكُونُ عَلَيَّ مِنْ رَمَضَانَ إِلَّا فِي شَعْبَانَ حَتَّى تُوُفِّيَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ
It is narrated from Sayyida Aisha (may Allah be pleased with her), she says: My practice was that I used to make up the missed fasts of Ramadan in Sha'ban, until the Messenger of Allah (peace and blessings be upon him) passed away.