Trick or treating for Unicef. Yalies, at least one of whom was clad in a Unicef-box-shaped costume, stood outside Blue State Coffee on Wall Street and the Davenport Theater (where “Bite Me Baby, One More Time: A Twilight Musical” is showing this weekend) Thursday, collecting money for the United Nations International Children’s Emergency Fund, which has provided emergency food and health care to children worldwide since 1946.

The Silli-haunting. Silliman College’s annual haunted house, touted as Yale’s largest, drew hundreds of students

Thursday night. Less than a decade old, the event featured student actors performing in Silliman’s basement.

God Quad for ping-pong. The Branford party suite held a pregame Thursday for the college’s intramural ping-pong match against Ezra Stiles later that night. The e-mail advertisement promised Branfordians that “instead of opening diplomatic relations with Ezra Stiles, we will be crushing them and intimidating them, making them cry and feel worse about themselves.” Despite Branford’s efforts, Stiles won the match.

In other IM news, a three-way tennis tie among Berkeley, Pierson and Timothy Dwight will be decided Friday with a coin toss. The college whose coin is not like the other two will qualify for the playoffs.

El Día de los Muertos, or the Day of the Dead, will be celebrated Sunday at the Latino Cultural center on Crown Street. On the holiday, which originated in Mexico, families pray for and remember deceased relatives and friends. At 7:30 p.m. Sunday, students will walk, carrying candles from Dwight Hall to La Casa.

Provost Peter Salovey, in a video message posted on Yale Hillel’s Web site, invited students to attend Sabbath dinners tonight in the residential colleges. “It will be delicious,” he promised.

Sleep an extra hour. Daylight Saving Time ends Sunday. At 2 a.m. on Nov. 1, the time falls back to 1 a.m.

Cupcakes and costumes. The Cupcake Truck, a mobile bakery that stops at various locations around New Haven, reminded customers about its upcoming costume contest on its blog Thursday. Costumed consumers who show up to the truck on Friday or Saturday have the chance to win 31 cupcakes. The truckers asked, however, that candidates leave their masks at home.

This day in Yale history

1970 The Yale Co-op raised prices, eliciting campuswide rumblings that it was a “cooperative in name only.”