Caption: Les Tres Riches Heures du Duc de Berry, Juillet (i.e., July), Musee Conde, Chateau de Chantilly. The Palace of Poitiers is in the background.

The month is July as lunette shows.

July was named for Julius Caesar (100--44 BCE)---fair enough since he instituted the Julian calendar in 46--45 BCE.

Credit/Permission: Brothers Limbourg (fl. 1385--1416) for their patron Jean, Duc de Berry (1340--1416), 1412--1416, source/photographer: R.M.N./R.-G. Ojeda (uploaded to Wikipedia by User:Petrusbarbygere, 2005) / Public domain.
Image link: Wikipedia: File:Les Tres Riches Heures du duc de Berry juillet.jpg.
Local file: local link: tres_riche_heures_07_july.html.
File: Art_t file: tres_riche_heures_07_july.html.