Summer's Day (or Jour d'eté) is an oil-on-canvas painting by the French Impressionist painter Berthe Morisot, created in 1879.

Finally, she found a balance between her maternal duty and her wish to resume her painting, by bringing her models to the park, so she could work there and be with Julie at the same time.

Morisot suggests a fleeting impression and reinforces this idea with small details, such as the carriage with its horses speeding past in the background.

The two women also posed for Édouard Manet and were painted once again by Morisot later that summer, also in the Bois de Boulogne, while picking flowers.

The result is an irregular texture of paint, which deviates completely from the smooth structure prescribed by the art academy of the time.

As in almost all her works, Morisot places particular emphasis on the feminine aspect, notably through the choice of motifs and a sensitive representation.

On 12 April 1956, the painting was stolen from the Tate Gallery in London, by two Irish students, Paul Hogan and Billy Fogarty, while it was on display there.