Zakat is an institution intimately tied up to the fiscal policies and roled to remove inequality in the Muslim society. Its application is not confined to a day or two but goes beyond a year.
The various aspects of Islam, ideological, spiritual, legal, social, political, are mutually consistent and Muslims to occupy themselves with worship only, but they are to work hard for the sake of furthering and implementing all its (Islam) various aspects in all walks of life and creating the best Muslim society and promoting it.
“it is He who produceth gardens, with trellises and without, and dates, and tilth with produce of all kinds, and olives and pomegranates, similar(in kind) and different (in variety): Eat of their fruit in their season, but render the dues that are proper on the day that the harvest is gathered. But waste not by excess: for Allah loveth not the wasters”. (sura 6: verse 141)
p/s: Pure 'it' before the 'time' is come!