National Health Observance Months 2025. National health observances (nhos) are special days, weeks, and months dedicated to raising awareness about important health topics. Each month, we feature select national health observances (nhos) that align with our priorities for improving health across the nation.
This calendar includes health observances and other events related to mental health that you can use to join the conversation and help raise awareness about mental illnesses. Learn about the women fighting in court for access to hpv vaccines.