You can amend your tickets up to 3 times on Booking Portal, unless otherwise stated in the description and/or T&Cs on your specific ticket type.
The selection of dates and times you see will be based on the type of ticket you have purchased. You will not be able to move your ticket to a date for which it is not eligible, such as a more expensive date or a weekend date for a weekday ticket.
The availability you will see is ‘live’ and based on other ticket sales. Certain dates and times for which you are eligible may still not be available if they have already sold out.