Emirates Change Flight states that your flights can be rescheduled for free as long as they are scheduled for more than seven days after you purchased the ticket. If you are eligible for Emirates's web-based oversaw reservations feature, you can make changes to a flight reservation through the website. Even though passengers are encouraged to take advantage of Emirates' 24-hour change of flights office in order to move or change their original flight date in accordance with their Emirates booking, the airline is unlikely to receive the request to roll out an improvement if there is less than an hour left before the passenger's original flight.

https://airlinespolicy.com/flight-change-policy/emirates-flight-change-policy/