-1π
It is all because of date and time format. So, once you manage it, it will be displayed.
events:
[
{ id: 10, title: "All day event", date: new Date('2022-02-25')}
{ id: 20, title: "Timed event", start: new Date(),allDay:true },
{ id: 30, title: "Timed event", start: new Date(),allDay:true },
],
Source:stackexchange.com