1860-1894 Union School, Morris, NY

Union School 1860 - 1894 in a Carey photo on a postcard. The image is 4 inch by 3 inch on a card 5.5 x 3.5 inches.

The back of the card which was never mailed there is a note written by pencil.
"where I went to school
Lillian Wood"

I searched ancestry.com for Lillian Wood and have a likely candidate. There's even an image of her in the PDF of her life story attached below.

You can click on a link to get a higher resolution image of the card in the colors that it has taken on with age.

Could this be a May Day celebration?