Today is the transgender flag day, commemorating the creation of the transgender flag by Monica Helms on August 19, 1999. This is the original flag that she donated to The Smithsonian in 2014.
Open link in next tab
https://cdn.shopify.com/s/files/1/0401/1373/3790/files/Trans-Flag-Smithsonian_600x600.jpg?v=1660919833
Source: https://flagsforgood.com/blogs/news/transgender-flag-day
The design has some competitors, like this neon green flag used in Israel:
And this version in use in Ottawa: