Up to 500 city workers could lose their jobs under a tentative deal Mayor Gavin Newsom reached Tuesday with union leaders as the city tries to close a projected $483 million budget deficit.

The two-year deal, which allows far fewer layoffs than the 1,500 or more that officials had been contemplating, also calls for an unprecedented shutdown of nonessential city services in the week between Christmas and New Year's Day. It covers about 20 unions and more than 90 percent of city workers, including nurses, clerks, librarians, engineers, firefighters and others.

Read the rest at sfgate.com.

Now you know what I know.