According to a report from Variety, local sources in Hong Kong are indicating that Hong Kong Disneyland could reopen as soon as September 18th, although no official announcement has been made by Disney or the local Hong Kong government.
This summer, after being closed and reopened once for COVID-19, the park was forced to close again due to an uptick in cases.
As a reminder, until confirmed by Disney or the government of Hong Kong this is strictly a rumor.