As a mark of respect to former president S R Nathan, the state flag on all government buildings will be flown at half-mast from today till Friday.
The body of Mr Nathan will lie in state at Parliament House from 10am on Thursday to noon on Friday, the Prime Minister's Office said in a statement.
Members of the public can pay their last respects at Parliament House from 10am to 8pm on Thursday.
On Friday, members of the diplomatic corps and other officials may pay their last respects from 9am to noon.
A state funeral service will take place from 4pm on Friday at the University Cultural Centre, National University of Singapore.
It will be attended by Mr Nathan's family, friends and former colleagues, as well as the President, Cabinet ministers, MPs, civil servants and Singaporeans from all walks of life.
It will be followed by a private cremation at Mandai Crematorium.
Condolence boards will be up at the Istana from 6am today for those who wish to pen tributes to Mr Nathan.
Condolence books will also be opened at all overseas missions for overseas Singaporeans and friends.
Members of the public can express condolences and share their memories of Mr Nathan at the official website, http://www.remembering.sg/srnathan, and the Remembering S R Nathan Facebook page at https://www.facebook.com/RememberingSRNathan
The public can also call the hotline on 6336-1166 for answers to their queries.