code: function to24Hour(time) {
          var meridiem = time.meridiem || time.meridian;
          return (meridiem === 'am' ? 0 : 12) + (time.hour % 12);
      }
docs: Convert 12-hour time to 24-hour format.
  
  @param {object} time Time object
  @param {number} time.hour Hour to convert (1-12)
  @param {string} time.meridiem Hour meridiem (am/pm). 'time.meridian' is
  supported for backwards compatibility.
  @return {number}