National Transgender HIV Testing Day is observed in the United States every April 18. Established in 2016 by the University of California, San Francisco Transgender Center of Excellence in collaboration with the CDC, this day highlights the importance of routine HIV testing and access to HIV-related resources for transgender, non-binary, and gender nonconforming individuals. The day aims to address the disproportionate impact of HIV on transgender individuals, particularly transgender women, who made up 2% of new HIV diagnoses in 2019. Activities on this day include encouraging transgender individuals to get tested for HIV, providing free HIV self-testing kits, and sharing resources on social media using hashtags like #NTHTD and #TransHIV. National Transgender HIV Testing Day is part of a broader effort to combat stigma and improve healthcare access for transgender people, who often face barriers in receiving consistent HIV care.