Moon day

Usually used when you want to say you're on your period

A:Hey!
B:Don't talk to me I'm on my moon day

by Potterswifey December 10, 2021

sang moon day

Usually a term used to describe the best day ever;
The term is usually used in professional golf tournaments

When a players posts an unbelievable round leading to a victory.
The term originated at the 2015 Barclays in Plainfield, New Jersey

Jordan Speith was having himself a sang moon day when he won the U.S Open.

by Sang moon day August 31, 2015

International Yell At The Moon Day

A holiday in which you can, without consequence, shout vulgarities at the moon.

International Yell At The Moon Day takes place on November 14th.

by MaybeARealWord January 13, 2022