An event every year that begins at 00:00 on of June, repeating indefinitely
An event every year that begins at 00:00 on day 30 of August, repeating indefinitely
When: June 30 and
First occurrence: .?.
The official Mai Tai Day is August 30,
which celebrates the birthday of the Mai Tai in 1944 when it was invented by Victor Bergeron.
However by mistake people confused the date and now Mai Tai Day is also celebrated on June 30.