It was narrated from 'Urwah, that 'Aishah said: "The Messenger of Allah married me in Shawwal and my marriage was consummated in Shawwal." --'Aishah liked for her women's marriages to be consummated in Shawwal --"and which of his wives was more beloved to him than me?" (Using translation from Nasāʾī 3236)   

تَزَوَّجَنِي رَسُولُ اللَّهِ ﷺ فِي شَوَّالٍ وَأُدْخِلْتُ عَلَيْهِ فِي شَوَّالٍ فَأَيُّ نِسَائِهِ كَانَ أَحْظَى عِنْدَهُ مِنِّي؟ قَالَتْ «وَكَانَتْ تَسْتَحِبُّ أَنْ تُدْخِلَ عَلَى النِّسَاءِ فِي شَوَّالٍ»