Women in white dresses and having fun. Danish artist Harald Slott-Møller. Living from 1864 to 1937, he was a founding member of the Den Frie Udstilling.

"Primavera." 1901.
“Primavera.” 1901. Oil on canvas. Collection of the KUNSTEN Museum of Modern Art, Aalborg. In the public domain in the United States because the artist has been dead over 70 years. via https://commons.wikimedia.org/wiki/File:Primavera,_Harald_Slott-M%C3%B8ller.jpg
"Two young girls in long white dresses picking roses in the garden." Study for the painting "Roses." No date.
“Two young girls in long white dresses picking roses in the garden.” Study for the painting “Roses.” No date. Image © 2018 Blouin Corp. Fair use license. via https://blouinartsalesindex.com/auctions/Harald-Slott-Moller-6873664/Two-young-girls-in-long-white-dresses-picking-roses-in-the-garden-of-a-whitewashed-house-
"The Afternoon Picnic." 1919.
“The Afternoon Picnic.” 1919. In the public domain in the United States because the artist has been dead over 70 years. via https://commons.wikimedia.org/wiki/File:Slot_Moller_Picnic.jpg
"Midsummer's Eve." 1904.
“Midsummer’s Eve.” 1904. In the public domain in the United States because the artist has been dead over 70 years. via https://commons.wikimedia.org/wiki/File:Harald_Slott-Moller_Midsummer%27s_Eve.jpg