The Day of Silence is the Gay, Lesbian and Straight Education Network's (GLSEN) annual day of action to protest the bullying and harassment of lesbian, gay, bisexual, and transgender (LGBT) students and their supporters. Students take a day-long vow of silence to symbolically represent the silencing of LGBT students and their supporters. The Day of Silence has been held every year in April since 1996.
On the appointed day, students maintain verbal silence either for the entire day or a portion of the day, such as during the lunch break. During their period of silence, participating students may hand out printed cards explaining the nature of their protest. This may be supplemented by additional texts or images.