How I can find the week details if we are selecting any date from date picker.
Thanks in advance
You can switch the date picker to "week" mode when it selects a week automatically. Please see my answer here:
You can also get the start and end date of the corresponding week for any DayPilot.Date object using the firstDayOfWeek() method:
const day = new DayPilot.Date("2022-09-02");
const start = day.firstDayOfWeek();
const end = start.addDays(7);