LGBT History Month is observed in January 2019. LGBT History Month is a month-long annual observance of lesbian, gay, bisexual and transgender history, and the history of the gay rights and related civil rights movements.
October was chosen by Wilson as the month for the celebration because National Coming Out Day already was established as a widely known event, on October 11, and October commemorated the first March on Washington for Lesbian, Gay and Bi Equal Rights and Liberation by LGBT people in 1979
Many gay and lesbian organizations supported the concept early on. In 1995, the National Education Association indicated support of LGBT History Month as well as other history months by resolution at its General Assembly. (With material from: Wikipedia)