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to_s 

        # DateTime.to_s

(from ruby core)
---
    dt.to_s  ->  string

---

Returns a string in an ISO 8601 format. (This method doesn't use the
expanded representations.)

    DateTime.new(2001,2,3,4,5,6,'-7').to_s
                             #=> "2001-02-03T04:05:06-07:00"

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.