To obtain a visa to travel to the United States, several documents are required including a valid passport with at least 6 months of validity, a completed DS-160 form, a 5x5 photo, and identification documents. If traveling, it is also important to be aware of several national holidays celebrated in the United States including New Year's Day on January 1st, Thanksgiving Day on the fourth Thursday of November, Independence Day on July 4th, and Halloween on October 31st.