Moviegoers can enjoy half-price tickets on National Day, as part of Hong Kong's celebrations marking the 75th anniversary of the country's founding on October 1.
Trams and cross-harbour ferries will be free, train passengers can get a 25 percent discount for trips on most MTR lines, while children can also enjoy free bus rides on most routes.
The MTR Corporation, meanwhile, said the discounts also apply to trips to Lo Wu and Lok Ma Chau on the East Rail Line, except for first class.
Journeys on the Airport Express and the Express Rail are also excluded from the discounted fares.
Speaking before the weekly Executive Council meeting, Chief Executive John Lee said the measures are part of hundreds of celebratory events in the SAR.
"The 75th anniversary of the founding of the People's Republic of China is a big day when the whole country rejoices. I encourage the public to eagerly take part in different activities, so as to celebrate enthusiastically the country's 75th anniversary," he told reporters.
Lee said some 3,000 eateries will offer discounts, as will many shopping malls, tourist spots and more than 10,000 shops at local wet markets.
There will be free admission at all government-run museums, many public sports facilities, as well as the Wetland Park
The CE also said 75 teams of civil servants will take part in volunteer work, while 750 elderly citizens will be able to enjoy free dental checks and 7,500 people will enjoy subsidised local tours.
Lee said Chief Secretary Eric Chan and other senior officials would provide more details about the offers later on Tuesday.