This Saturday is packed with local holiday events as JP Centre/South Main Streets is holding its Holiday Stroll, numerous businesses are participating in the 4th Annual Shop with a Cause, the Mayor's Enchanted Trolley Tour has two stops in JP -- and the Boston Pops Esplanade Orchestra is performing. Numerous businesses on Centre and South streets are planning events throughout the day from 11 am to 4 pm. There will be an information table at the Monument (South and Centre streets) from 11 am to 4 pm with a list of the day's events -- and free hot cocoa. You can also check online here for a map of events. At 11:30 am, a jazz trio from the Boston Pops Esplanade Orchestra will perform at the JP Branch Library.