With four days remaining before Mayor Bloomberg is sworn in for his second term at City Hall, more details of the ceremony and the celebration to follow emerged yesterday.

Thousands of cups of hot cider made from New York apples have been prepared to keep the expected 5,000 guests warm before the start of the inauguration on Sunday afternoon, and old-fashioned plain doughnuts have been baked to stave off stomach grumbles.

Each guest who attends the formal ceremony, at which the mayor, the comptroller, and the public advocate are administered the oath of office, will receive a commemorative program featuring a photograph of City Hall by a well-known New York photographer and Princeton University lecturer, Andrew Moore. Attendees also each will receive a commemorative travel mug.

On each of the 5,000 seats arranged on City Hall Plaza for the event will be a blanket, even though the forecast for January 1 is an unseasonably mild 47 degrees. In recent decades, the weather has been at freezing, or below, on inauguration days, according to officials who have attended the ceremonies over the years.

Among the people who are expected to attend this year’s ceremony are mayors Giuliani, Dinkins, and Koch.

The mayor’s mother, Charlotte Bloomberg, who will turn 97 on January 2, will also attend, as will the mayor’s daughters Emma, 26, and Georgina, 22, and his sister Marjorie.

Mr. Dinkins will administer the oath of office to the public advocate, Betsy Gotbaum. The city comptroller, William Thompson Jr., will be sworn in by his father, the former New York State Appellate Court justice, William Thompson, while the mayor will be sworn in by the chief judge of New York State, Judith Kaye.

After the ceremony, guests of the mayor and Ms. Gotbaum will walk a few blocks to the Emigrant Industrial Savings Bank Building across from Tweed Courthouse for a celebration.

On the menu will be tomato soup, grilled cheese, hot dogs, hamburgers, turkey with cranberry sauce, and grilled vegetables. Snacks will include one of the mayor’s personal favorites, popcorn.

For dessert, there will be cupcakes decorated with the New York City colors, orange and blue, as well as cookies and brownies.

Beverages will be exclusively from New York, with chardonnay and merlot from Wolffer Estate Vineyards in Sagaponack, Long Island, and beer from the Brooklyn Brewery.

While the cost of the inauguration ceremony and reception currently is unknown, both events will be funded by the inaugural committee that the mayor will pay out of his own pocket, as he did in 2002.

As The New York Sun reported yesterday, the comptroller will have his own separate party at 60 Centre St.