code: function(unit) {
        var params = {}, recognized;
        unit = unit || 'hours';
        if(unit === 'date') unit = 'days';
        recognized = DateUnits.some(function(u) {
          return unit === u.unit || unit === u.unit + 's';
        });
        params[unit] = unit.match(/^days?/) ? 1 : 0;
        return recognized ? this.set(params, true) : this;
      }
docs: *
  @method reset([unit] = 'hours')
  @returns Date
  @short Resets the unit passed and all smaller units. Default is "hours", effectively resetting the time.
  @example
  
  Date.create().reset('day')   -> Beginning of today
  Date.create().reset('month') -> 1st of the month
  
  *