What day every year is the Reaping held?

Reaping Day is held on July 4th every year.

Fifty-some years ago, the districts rose up against our Capitol's oppression, kicking off a bloody civil war in Panem. We lost, and in punishment every July 4th, each of the districts routinely has to send two tributes, one girl and one boy between the ages of twelve and eighteen, to fight to the death in an arena. The last kid standing gets crowned as the victor.

The reaping is where they draw our names for the Hunger Games. Two pens, one for the girls and one for the boys, have been clearly marked out with orange ropes. Traditionally, the twelve-year-olds gather in the front and the kids get older until you reach the eighteen-year-olds in the back.