text: module.exports = function getSeason(date) {
    if(!date) return 'Unable to determine the time of year!'
    if(Object.prototype.toString.call(date) === "[object Date]"){
      switch(date.getMonth()+1){
        case 1: case 2: case 12: return 'winter' 
        case 3: case 4: case 5: return 'spring'
        case 6: case 7: case 8: return 'summer'
        case 9: case 10: case 11: return 'fall'
        default: return 'Unable to determine the time of year!'
      }
    } else  if(isNaN(date.getTime())) {
      throw Error()
    }
  };
  