How is zakat calculated if you calculate it by the Gregorian year and the time to pay it is due on April 23rd, and you decided to delay paying it until Ramadan to calculate it annually from the beginning of Ramadan, which means a delay of approximately two months?

Zakat (definition) must be calculated according to the lunar (Hijri) calendar. Calculating it using the Gregorian calendar is incorrect because it leads to its delay. The questioner must calculate the time when her wealth reached the nisab (definition) (minimum threshold) using the Hijri date and make this date the season for paying Zakat every year. It is not permissible to deliberately delay Zakat after it becomes due. Rather, it is obligatory to hasten its payment immediately upon the completion of the hawl (one lunar year).