American Secular Holidays Calendar
Calculates secular dates for any year for U.S. federal holidays, current trading holidays, and other celebrated observances.
timeanddate.com's Calendar Page
Monthly calendar. Shows the full year's calendar on one page. Site also creates calendars for any year or month with your country's holidays and languages, as well as moon phases.
Lists Humanist celebrations and events focused on the separation of church and state, forethought, and rational thought.
Religion & Ethics NewsWeekly presents an online copy of the Multifaith Calendar created to express cultural concepts of time and existence, and bring together history, myth, legend, worldview, and morality.
Displays the date and notes holidays for a number of countries, based on IP address.