Move DateTime : Date Calculation « Date « Ruby






Move DateTime


require 'date'

puts y2k_dt = DateTime.new(2000, 1, 1)
puts (y2k_dt >> 1).to_s                          # => "2000-02-01T00:00:00Z"
puts (y2k_dt << 1).to_s                          # => "1999-12-01T00:00:00Z"

 








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6.leap year day
7.Counting the Days Since an Arbitrary Date
8.advent calendar
9.Minus DateTime by day
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