Number 1: San Francisco became the first city in the nation to offer free diapers to all families on public benefits . . . 441: Number of felony defendants as of May 6 whose cases had gone past the final date for trial, due to a backlog of cases in Superior Court, according to the Examiner’s Al Sarcevic . . . June 1: Date when parking fees increase in The Presidio . . . 170 years: Age of Ghirardelli Chocolate Company, which just reopened its redesigned chocolate and ice cream parlor in the aptly named Ghirardelli Square.