April 15 in the United States

Word Meaning:

TAX — Money or goods collected by a government (or an entity to whom the government has delegated this power, e.g. in tax farming) to fund itself and its services, for example by levying a charge on income, purchases (sales), property or harvest, other than that money which is collected by the government in exchange for specific goods (e.g. the purchase of surplus vehicles).

Definitions from Wiktionary.