Question: What formal dance has a tradition of female students asking the male students to the dance?

Context paragraphs:
Opus Hall: Opus Hall is a dormitory and one of 10 housing options for students at The Catholic University of America.  It opened in 2009 and houses 395 upperclassmen.  Opus is the only dormitory building on campus that houses both male and female students; male students reside in the South wing, and females reside in the North wing.

Qassim University: Qassim University is a public university in Buraydah in the Al-Qassim Province of Saudi Arabia.  It was established in 2004 jointly between King Saud University and Imam Muhammad ibn Saud Islamic University, each of which used it as its Qassim campus.  Subsequently, its constituent colleges became a part of Qassim University.  The main campus of Qassim University covers about eight square kilometers in the heart of the region in Buraydah.  Qassim University has over 38 Colleges, offering 17 PhD, 62 master, and 731 Bachelor and diplomas programs [1].  The government approved allotments for Qassim University in 2013 was 2,351 million riyals (approx 626.87 million US Dollar) [2].  There are campuses in different cities in Al-Qassim Province.  During 2008, enrolment at Qassim University was 40,000 students.  Faculty and staff totalled 3,500.  During 2016/2017, the admission department stated that there are 7019 male students and 9692 female students was accepted as new students at Qassim University [3]; and the number of Faculty and staff is approx 6000.

Sadie Hawkins dance: In the United States and Canada, the Sadie Hawkins Dance is a usually informal dance sponsored by a high school, middle school or college, in which female students invite male students.  This is contrary to the custom of male students typically inviting female students to school dances such as prom in the spring and Homecoming in the fall.

Winston Churchill Collegiate Institute: Winston Churchill Collegiate Institute (Winston Churchill CI, WCCI, Churchill) is a public high school in the Dorset Park neighbourhood of Scarborough, Toronto, Ontario, Canada and is owned and operated by the Toronto District School Board (and the former Scarborough Board of Education prior to merger.)  Although the language of instruction is English, 59 percent of the students do not use English as their primary language, and 26 percent have resided in Canada less than five years.  In Spring 2007, there were 554 male students and 467 female students.  Since then, the enrollment sits below 1000 with 644 students.  The motto for Winston Churchill is "Fides, Virtus, Doctrina" which means "Faith, Excellence, Knowledge".

Winter Formal: Winter formal, also called Winterfest, Winter Ball, Sweethearts, Snow Ball, or Queen of Hearts Dance, is a dance held by high schools in the United States and Canada.  It takes place between homecoming and prom, usually between December and March.  At some schools, this dance may supplement or replace a Sadie Hawkins dance.

SMU St. Angela: SMU St. Angela is a private Catholic school located at Jalan Merdeka 24 Bandung, West Java.  It was founded by Dutch Ursuline nuns in 1905.  The school was originally exclusive for female students, but now it also accepts male students.  Although it's a private Catholic school, it also accepts non-catholic students.  The school's motto is "Serviam", roughly translates as "to serve".

Jamal Mohamed College: Jamal Mohamed College is a Government-aided and self-finance institution founded in 1951 by M. Jamal Mohamed Sahib and N.M. Khajamian Rowther.  The college campus is located in Tiruchirappalli, India and is affiliated to Bharathidasan University.  The Day session is for male students and Evening session is for female students.

Myitkyina University: Myitkyina University is a university in northern Myitkyina, Myanmar.  Since 1996, on-campus student housing has been banned.  However, there are plans to reopen the Hkakabo (to house 120 male students) and Swunparabo (to house 128 female students) residence halls in 2013.

Sekolah Menengah Kebangsaan Bukit Jelutong: Sekolah Menengah Kebangsaan Bukit Jelutong (Often abbreviated as "SMKBJ" or "SMK Bukit Jelutong") is a government school located in Shah Alam, Selangor.  On 10 July 2015, principal Aisah binti Sidan retires after five years assuming the office since 2010, following the retirement of former principal of SMKBJ, Datin Aisah binti Jaman.  The position was later occupied by Hajjah Che Sapura, which became official on 16 November in the same year.  In 2012, the school has 926 male students and 939 female students, bringing a total of 1865 students.

Cervini-Eliazo Residence Halls: Cervini Hall and Eliazo Hall are the on-campus dormitories for college students of the Ateneo de Manila University.  Cervini Hall is for male students, and neighboring Eliazo Hall is for female students.  Located at the highest point of the campus, it can accommodate 204 male students in 51 rooms.  However, only a quarter of these slots is available for freshmen or new dormers each year.

Supporting paragraphs: Winter Formal Sadie Hawkins dance
Answer: Sadie Hawkins Dance