Three Kings Day (or Dia de los Reyes) is a Christian holiday that celebrates the Magi who brought gifts to the Christ child. The holiday is celebrated twelve days after Christmas on January 6 and is often observed by the U.S Hispanic community (particularly by Mexican-Americans, especially on the east coast and in Puerto Rico).
Customarily, rather than giving gifts on Christmas, gifts are given on Three Kings Day at the end of the traditional celebration of the Twelve Days of Christmas (which begins with Christmas, rather than ends with it).
In some regions of Mexico, it is traditional for children to leave their shoes out on the evening of January 5, sometimes filling them with hay for the camels, so that the Magi will be generous with their gifts. This is analogous to children leaving cookies out for Santa Claus.
