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Is there a default Ruby Date object?

I happened to stumble upon this by trying some kind of code in pry :

 >> Date.new(2015, 1, 8) ArgumentError: wrong number of arguments (3 for 0) from (pry):6:in `initialize' >> require 'date' => true >> Date.new(2015, 1, 8) => #<Date: 2015-01-08 ((2457031j,0s,0n),+0s,2299161j)>

Note. This is a pure Pry run, there are no custom constants named Date .

Questions:

  • Is there a default Date object already defined in Ruby ?
  • What exactly is required for require 'date' ?
  • Why is there such a variation in behavior?
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