In preparation for the Pesach holiday, it is an age-old Jewish tradition to contribute generously towards funds that ensure that indeed everyone who is in need has the necessary provisions for the holiday - food, matzah, wine, festive clothing, etc.
This special Pesach fund, originally intended to provide the poor with matzah, is know as ma'ot chitim, "the wheat fund," or kimcha d'pischa, "Pesach flour."
The collection of ma'ot chitim begins thirty days prior to the holiday, and the funds are distributed by the Shabbat preceding the holiday. If one has not yet given by then, one should anyways give, even up until the last moments before the onset of the holiday.
And when you help others to celebrate a joyous holiday, Hashem will certainly reciprocate in kind, and grand you and yours a happy and kosher, a meaningful and liberating, holiday of Pesach!