A History of Time Explains the importance of concept of time in the history of mathematics, science and measurement.
http://www-history.mcs.st-andrews.ac.uk/HistTopics/Time_1.html - [ Report Dead Link ]
NPR : 'Seize the Daylight': A History of Clock Chaos Benjamin Franklin first called for the government to tinker with clock hours in the 1780s. But it wasn't until World War I that the United States adopted daylight-saving time as a way to get more efficiency out of the day. "Seize the Daylight" Author David Prerau talks about the complicated politics and curious history of DST, and he shares an excerpt from his book. [4:54 streaming audio broadcast]
http://www.npr.org/templates/story/story.php?storyId=4572036 - [ Report Dead Link ]
The Calendar Summarizes the history of various calendars developed and used over the centuries.
http://www.skeptics.com.au/journal/calendar.htm - [ Report Dead Link ]