Hay!

tonight is the full moon of July,

called the "full Hay moon" -

least that's what my great-grandma B called it. 

She said it was because there was a full moon

and

we were finished putting up the hay.

So, I did a little research, and by-gum, she was right!

July's full moon is known as
the Full Hay Moon!
It's also known as the Full Buck Moon -
because this is the time when male deer's antlers start budding out.
July's full moon is also known as the Full Thunder Moon - as this is the month with the most thunder.

So, I guess, take your pick -

Hay, Antler or Thunder...

it's full moon night in July -

and I'm going outside tonight

to enjoy the Full Hay Moon tonight!