ADDITIONAL RESOURCES FOR JUNE 30

GOOD WEB LINKS

http://www.boulder.nist.gov/timefreq/pubs/bulletin/leapsecond.htm
This link will take you to the National Institute of Standards and Technology’s Physics Lab in Boulder, Colorado. Their Time and Frequency Division is the keeper of official time for the United States. Their explanation of the leap second is short and sweet. It includes a list of the leap seconds that have been added since 1972 as well as a notice about whether or not one is expected soon. Once you’re at this site, you might want to check out their link to CURRENT TIME, where you will learn the exact time in your time zone to within two seconds, and their FREQUENTLY ASKED QUESTIONS section just to see if they’ve answered any questions you’ve been asking.

http://www.leapsecond.com
This is a one-man Web site full of information about time. His home page includes several interesting links: <http://www.leapsecond.com/notes/whyls.htm> takes you to his brief discussion of leap seconds. <http://www.leapsecond.com/java/nixie.htm> takes you to a clock that’s counting down to the next leap second. And <http://www.leapsecond.com/java/gpsclock.htm> takes you to a page that uses your computer’s time to generate five different kinds of time. This page also offers numerous links to other Web sites that have information about leap seconds.

http://tycho.usno.navy.mil/leapsec.html
The U.S. Naval Observatory’s Time Service Department offers the most detailed and authoritative discussion of leap seconds, but the link that’s supposed to lead to information on the most recent leap second leads to an error message, and the link that’s supposed to lead to the historical list of leap seconds leads to a document my computer won’t read. (The Boulder site listed above offers this information right on the page I’ve linked you to.)