A few solutions for Date#ajd not yielding rationals for display.

test_ajd.rb

require 'date'

time = Time.now.utc
puts time
year = time.year
month = time.month
day = time.day
puts DateTime.new(year, month, day).ajd * 1.0
puts DateTime.new(year, month, day).ajd / 1.0

require 'bigdecimal'
def bd(var)
    return BigDecimal.new(var.to_s)
end

puts bd(DateTime.new(year, month, day).ajd) / 2.0