Online calendars of holidays are available at TimeAndDate.com and WinCalendar.com. The calendar at Time and Date lists major U.S. holidays and the dates they are observed, while the calendar at Win Calendar shows the present month with holidays and observances written on the appropriate days.
Holidays in the United States may be broadly divided into federal holidays, religious holidays and other holidays. Federal holidays are major holidays during which federal employees are granted the day off. Religious holidays are the dates of important religious observations for various faiths, and other holidays are largely cultural celebrations like Mother's Day, Valentine's Day or Halloween.