advent calendar : Date Calculation « Date « Ruby

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Ruby » Date » Date Calculation 
advent calendar


require 'date'
def advent_calendar(date=DateTime.now)
  christmas = DateTime.new(date.year, 1225)
  christmas = DateTime.new(date.year+11225if date > christmas
  difference = (christmas-date).to_i
  if difference == 0
    puts "Today is Christmas."
  else
    puts "Only #{difference} day#{"s" unless difference==1} until Christmas."
  end
end

advent_calendar(DateTime.new(20061224))

 
Related examples in the same category
1. Subtract 61 days from a date:
2. Add and subtract six months using the >> and << methods.
3. Doing Date Arithmetic
4. Doing DateTime Arithmetic
5. Minus one DateTime from another
6. Move DateTime
7. leap year day
8. Counting the Days Since an Arbitrary Date
9. Minus DateTime by day
10. Remaining days
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