相关背景：独立日是美国的主要法定节日之一，日期为每年7月4日，以纪念1776年7月4日**会议在费城正式通过《独立宣言》。《独立宣言》由托马斯·杰佛逊起草，1776年7月4日经**会议专门委员会修改后通过，并由**会议主席约翰·汉考克签字生效。《独立宣言》开宗明义地阐明，一切人生而平等，具有追求幸福与自由的天赋权利；淋漓尽致地历数了英国殖民主义者在美洲**犯下的罪行；最后庄严宣告美利坚合众国脱离英国而独立。《独立宣言》是具有世界历史意义的伟大文献。通过《独立宣言》的这一天也成为美国人民永远纪念的节日，定为美国独立日。

Independence Day is the national holiday of the United States of America commemorating the signing of the Declaration of Independence by the Continental Congress on July 4, 1776, in Philadelphia, Pennsylvania.

At the time of the signing the US consisted of 13 colonies under the rule of England's King George III. There was growing unrest in the colonies concerning the taxes that had to be paid to England. This was commonly referred to as "Taxation without Representation" as the colonists did not have any representation in the English Parliament and had no say in what went on. As the unrest grew in the colonies, King George sent extra troops to help control any rebellion. In 1774 the 13 colonies sent delegates to Philadelphia Pennsylvania to form the First Continental Congress. The delegates were unhappy with England, but were not yet ready to declare war.

In April 1775 as the King's troops advanced on Concord Massachusetts Paul Revere would sound the alarm that "The British are coming, the British are coming" as he rode his horse through the late night streets. The battle of Concord and its "shot heard round the world" would mark the unofficial beginning of the colonies war for Independence.

The following May the colonies again sent delegates to the Second Continental Congress. For almost a year the congress tried to work out its differences with England, again without formally declaring war.

By June 1776 their efforts had become hopeless and a committee was formed to compose a formal declaration of independence. Headed by Thomas Jefferson, the committee included John Adams, Benjamin Franklin, Philip Livingston and Roger Sherman. Thomas Jefferson was chosen to write the first draft which was presented to the congress on June 28. After various changes a vote was taken late in the afternoon of July 4th. Of the 13 colonies, 9 voted in favor of the Declaration, 2 - Pennsylvania and South Carolina voted No, Delaware undecided and New York abstained.

And although the signing of the Declaration was not completed until August, the 4th of July has been accepted as the official anniversary of United States independence. The first Independence Day celebration took place the following year - July 4 1777. By the early 1800s the traditions of parades, picnics, and fireworks were established as the way to celebrate America's birthday. And although fireworks have been banned in most places because of their danger, most towns and cities usually have big firework displays for all to see and enjoy.