This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
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Date & Time
Mathematica has a highly flexible system for handling dates and times in almost any format, automatically converting between formats, and when necessary parsing strings representing dates.
DateString current or specified date as a string in many possible formats
"DateTime"  ▪ "MonthName"  ▪ "DayName"  ▪ "Hour24"  ▪ ...
$DateStringFormat default date string format
$TimeZone resettable current time zone
    
DateList date elements as numbers in {y, m, d, h, m, s} format
AbsoluteTime absolute time in seconds
Clock real-time dynamic clock variable
    
Date Operations
DatePlus add or subtract days, weeks, etc. to a date list or string
DateDifference find the difference in days, weeks, etc. between two dates
    
Visualization
DateListPlot, DateListLogPlot plot data associated with dates in any format
    
Date Import/Export
"Table"  ▪ "XLS"  ▪ "MDB"  ▪ "ApacheLog"  ▪ "MBOX"  ▪ ...
DatePattern date pattern for string manipulation
"XLS"  ▪ "ApacheLog"  ▪ "MBOX"
    
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