1. When we pursue what we like, time seems to pass quickly. Such as playing games, watching movies, reading good books, chatting with friends and so on.
2. When we are very focused and devoted, time will feel fleeting. Such as sports or artistic creation.
When we are busy, time will feel flying. Such as work or academic tasks.
When we have many interesting, pleasant and relaxing experiences, time will feel fleeting.
When we travel or have a holiday, time will also feel flying.
Generally speaking, when we are full and satisfied, time often feels fast, while when we are unhappy or unhappy, time feels slow.