start_of_day.go

func StartOfDay(t time.Time, timezone string) time.Time {
   location, _ := time.LoadLocation(timezone)
   year, month, day := t.In(location).Date()
   
   fmt.Println("currentTime: ", t)
   
   dayStartTime := time.Date(year, month, day, 0, 0, 0, 0, location)
   
   fmt.Println("StartOfDay: ", dayStartTime)
    
   return dayStartTime
}


/* get start of the day for given time */
StartOfDay(time.Now(), "Asia/Kolkata")

//output:
currentTime:  2022-07-01 22:47:16.791297534 +0530 IST m=+0.000346856
StartOfDay:  2022-07-01 00:00:00 +0530 IST