Is it better to pay Zakat in Ramadan? And what is the evidence for that?

Zakat must be given immediately upon the completion of its year (hawl), except for zakat on crops, which is due on the day of harvest. It is disliked to delay it without a valid excuse. It is permissible to pay zakat in advance before its due date, even for two coming years, as Al-Abbas did with the Prophet, peace and blessings be upon him. Charity in Ramadan is better, but it is not permissible to delay obligatory zakat due before Ramadan in order to give it during Ramadan. Paying zakat outside of Ramadan might be better if there is an urgent need among the poor, such as a disaster or famine, or to ensure the needs of the poor are met outside of Ramadan when fewer people pay zakat. Sheikh Ibn Uthaymeen held the view that it is permissible to delay zakat for the benefit of the poor, such as giving it at a time of their urgent need outside of Ramadan.