Have you ever consider the odd collection of numbers that make up the standard western calendar, 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day and varying numbers of days in the months and years. The origins of some of these numbers and the basis of the modern calendar go back over 6000 years.
The origins of the different numbers and how they became the modern calendar is told in my featured paper published in the July edition of PM World Journal. To read the paper and sign up for the free monthly e-Journal go to: http://pmworldjournal.net/article/the-origins-of-the-coordinated-universal-time-utc-calendar/
For more papers on the history of project management see: http://www.mosaicprojects.com.au/PM-History.html