These sites provide information on time in general or provide the current time over the web. Sites related to the Network Time Protocol (NTP) can be found in Computers/Internet/Protocols/NTP. Other categories contain information on time as it relates to Geology and Astronomy.
Sites related to information on time in general, history of concepts, definitions, measurements, clocks and watches.
Sites related to or proposing non-standard systems of calculating time, not based on hours, minutes and seconds.
All sites related to Clocks and Watches.
Sites related to Clocks and Watches in general, especially with a scientific or mechanical interest.
Sites whose primary purpose is to provide the current time in various time zones.
Sites related to Horology, the science and technology of timekeeping. This category includes the theory, the history, the technology, the art and every imaginable aspect of Horology.