Thank you for your query. You may simply refer to
Chapter 8: End of Year Payment of A Concise Guide to the Employment Ordinance
https://www.labour.gov.hk/eng/public/wcp/ConciseGuide/08.pdf

Presumption
For every employment contract made after 27 June 1997, it is presumed that an annual payment or annual bonus is not of a gratuitous nature and is not payable only at the discretion of the employer unless a written term or condition in the contract expresses intention to the contrary.

Eligibility for End of Year Payment
An employee is eligible for an end of year payment if he has been employed under a continuous contract for a whole payment period. The payment period shall be the period specified in the employment contract, or a lunar year if it is not specified.

If you last working day is beyond the payment period, theoretically you are entitled to the End of Year Payment.

The abovmentioned viewpoint is only for reference, if you need further assistant, please dial 2779-3766 and contact Ms Yim or Miss Chan or Mr Chu.