May.
The Merry Month of May - novel - was created in 1971.
"May" and "merry" are month homonyms.
While strolling through the park one day, in the merry merry month of May, I was taken by surprise by a pair of rogueing eyes, and my poor heart was stole away.
The poem "Merry Month of May" was written by Thomas Dekker, an English playwright and poet from the Elizabethan era.
America Pauses for the Merry Month of May - 1959 TV was released on: USA: 18 May 1959
Richard Barnfield
X-Men were previously called The Merry Mutants
If You Still Want To Know... The Song Is Called Calling To Say By Serena Ryder
The Donna Reed Show - 1958 The Merry Month of April 3-29 was released on: USA: 6 April 1961
King Charles II was known as the merry monarch.
Pepys called his hat maker (milliner) a "mad merry slut". "So homeward, and called at my little milliner's, where I chatted with her, her husband out of the way, and a mad merry slut she is. "Thurs 4 Feb 1664
Yes, there is a popular Christmas carol called, "God Rest Ye Merry Gentlemen."