What is the time limit for stamping?

Different documents have different time limits for stamping. Here are some time limits for some common documents:

Nature of documentTime limit (within __ after the date of execution)
Conveyance on sale (including deed of gift)30 days
Lease30 days
Contract note for purchase or sale of Hong kong stock2 days (if effected in Hong Kong) 30 days (if effected elsewhere)
Instrument of Transfer of Hong Kong stockBefore the date of execution (if executed in Hong Kong)30 days (if executed outside Hong Kong)
Gift of Hong Kong stock7 days (if executed in Hong Kong)30 days (if executed outside Hong Kong)

Extracted from Time Limit for Stamping: https://www.gov.hk/en/residents/taxes/stamp/time_limit_for_stamping.htm