Bi Visibility Day
Bi Visibility Day also known as International Celebrate Bisexuality Day has been marked on 23rd September each year since 1999. It started as a date for the bisexual community to celebrate and recognise its own work and acheivements, but has grown over time to be more outward looking a public date.
Though the initiative started in the USA, it has been consistently marked in the UK by the UK bi community as well - in particular by groups such as BiPhoria, Brighton Bothways, and Edinburgh Bi Group.
A list of UK and international events to mark the date is kept at BiVisibilityDay.com