1. The day was first observed in 1996 by students at the University of Virginia. Over 150 students participated. The day was organized in response to an assignment on non-violent protests. The next year, nearly 100 colleges and universities participated in the event.

2. GLSEN became the official sponsor for LGBT Day of Silence in 2001. GLSEN stands for Gay, Lesbian and Straight Education Network. The organization's website says it works "to  improve school climate and champion LGBT issues in K-12 education."

3. It is part of a larger effort to create a safe school environment for lesbian, gay, bisexual and transgender people, as well as others on the LGBT spectrum.

4. The day has been publicly supported by celebrities. Many famous supporters in recent years are members of the LGBT community, including actress Laverne Cox, singer Chely Wright, YouTube personality Tyler Oakley and actor Jim Parsons.

5. GLSEN says students have a right to protest. The organization says those in middle and high school should get permission from school administration. Students can also participate in rallies and events outside of school in their local community, or have a silent lunch while still participating in class.