Ibn al-Qayyim رحمه الله said: Giving al-ṣadaqah (ie: charity) on Fridays has a distinct advantage over the rest of the weekdays. Its superiority is similar to giving charity in the month of Ramaḍān in contrast to the rest of the months. [Zād al-Maʿād fī Hadyi Khayr al-ʿIbād 1/394]