March 5, 2026
USA
National Hospitalist Day/ Multiple Personality Day
In 1980, Multiple Personality Disorder was officially included in the Diagnostic and Statistical Manual of Mental Disorders, Third Edition (DSM-III)
In 1994, the name was changed to Dissociative Identity Disorder in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) to emphasize identity fragmentation rather than multiple fully formed personalities
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