Readily tell the time anywhere in the world using our frequently updated time zone database. A Summary of the International Standard Date and Time Notation - a good overview of the ISO 8601 notation for dates. International Time Zones - A table of time difference between the USA's time zones and the rest of the world. Timezone Converter - Converts an entered time from one timezone to another. Time - Displayed in a variety of useful formats.
Site is a front-end to U.S. government atomic clocks.
Daylight Saving Time - History of Daylight Saving Time and how we use it to save energy. Daylight Saving Time begins for most of the United States at 2 a.m. on the first Sunday of April. Time reverts to standard time at 2 a.m. on the last Sunday of October. Monday lasts 48 hours. The Institute for the Study of Interdisciplinary Sciences publishes this journal dealing with issues of chronology with respect to ancient history.