May i use 1 day Airport Express Pass to Hong Kong one day at 11am and return next day at 7 am?

Do you refer to Tourist Day Pass? If yes, you can use it only on MTR and Light Rail (except AE train, MTR Bus, East Rail Line First Class and travel to/from Lo Wu or Lok Ma Chau stations) for 24 consecutive hours starting from the recorded entry time of the first journey on the MTR.