Time- and date-based information plays a significant role in our lives and, accordingly, programmers must commonly wrangle with temporal data within their websites. When was a tutorial published? Was a product's pricing information recently updated? What time did the office assistant log into the accounting system? At what hour of the day does the corporate website see the most visitor traffic? These and countless other time-oriented questions come about on a regular basis, making the proper accounting of such matters absolutely crucial to the success of your programming efforts.