From the Hillel listserv:

On Sunday February 11 the Jewish Federation of Greater Philadelphia will be holding its annual Super Sunday event.
At this event thousands of people of all ages join together to create a giant phone-a-thon and raise funds for Israel as well as for the local Jewish community. Penn Hillel as part of Hillel of Greater Philadelphia is a significant beneficiary of the Federation, and is heavily recruiting student volunteers.
There will be a bus from Penn Hillel at 1 p.m. on Sunday which will take Penn participants to 4200 City Avenue and return to campus by 4 p.m. Penn’s Hillel will be offering a free pizza lunch at 12 p.m.