Over 11,800 people turned up at the Istana Open House on Wednesday, as the Singapore Symphony Orchestra (SSO) performed at the event for the first time.

President Tony Tan Keng Yam and his wife Mrs Mary Tan were part of the festivities, mingling with visitors for about 90 minutes in the afternoon.

Dr Tan and his wife, along with the visitors, were also entertained by the SSO performance, which was sponsored by Singapore Press Holdings, and is part of the SPH Gift of Music series.

Speaking to reporters, Dr Tan said he was glad to see many families at the open house. He added that Labour Day should be a celebration for all, not just workers.

"Everyone has a role to play in building our economy, because workers need the support of their spouses and families," he said.