Good Morning Miss Nuntita,
As per your booking your check-in time is at 3pm on May 20th. However if you would like to check-in at 2am on 20th May, I suggest you book on the 19th May even though you come in at 2am on the 20th you still have the room reserved. If not it will have an extra charge of 1 more night pay as walk in rate and it has to depend on the room availability on the 20th.