Is Zakat obligatory on the amount of 24,900, which was accumulated from a personal cooperative society and monthly savings, and what is its amount, and is Zakat due on the remaining amount after the passing of a full year (hawl)?

The calculation of zakat (definition) must be based on lunar months, not Gregorian months, because Allah Almighty says: “They ask you, [O Muhammad], about the new moons. Say, “They are measurements of time for the people and for Hajj.”” The hawl (one lunar year) for zakat on money begins when the nisab (definition) (minimum threshold) is reached for the savings from salary and the amount paid to the association. When the hawl is completed, zakat is determined based on the salary and the amount paid to the association at the time the hawl is completed. The easiest method is to pay zakat on all the money you possess when the first hawl on the first nisab is completed. For example, if you acquired your first nisab in Ramadan (definition), then in the following Ramadan, you pay zakat on all that you have saved and paid to the association. If zakat has been paid on money and a hawl passes over it again, zakat must be paid on it again if the remaining amount still constitutes a nisab. The nisab for current banknotes is the equivalent of 85 grams of gold or 595 grams of silver, and one-quarter of one-tenth (2.5%) must be given out.