A Summary of the International Standard Date and Time Notation a good overview of the ISO 8601 notation for dates. Atomic Clock Time Displayed in a variety of useful formats.
Site is a front-end to U.S. government atomic clocks.
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. Horology - The Index Horology is the science of time, timekeeping and timekepers. This site is an organized collection of links to about 3000 links to horological websites globally.