1array.sort((a,b) =>  new Date(b.date) - new Date(a.date));
2

1const sortedActivities = activities.sort((a, b) => b.date - a.date)
2

1const activities = [
2  { title: 'Hiking', date: new Date('2019-06-28') },
3  { title: 'Shopping', date: new Date('2019-06-10') },
4  { title: 'Trekking', date: new Date('2019-06-22') }
5]
6

1array.sort(function(o1,o2){
2  if (sort_o1_before_o2)    return -1;
3  else if(sort_o1_after_o2) return  1;
4  else                      return  0;
5});