def date_ge(left, right)
      left  = str_to_dt(left)
      right = str_to_dt(right)

      left >= right
    end
def date_ge(left, right)
      left  = str_to_dt(left)
      right = str_to_dt(right)

      left >= right
    end
Check if +left+ is greater than or equal to +right+, where both are string
 representations of a date.

 @param left [String] A string representation of a date.
 @param right [String] A string representation of a date.
 @return [Boolean] True if +left+ is greater-than-or-equal to +right+,
   otherwise false.