I definitely think that you can wear it all year with the right outfit. I agree that it is more formal, but that doesn't mean that you can't tote it around in the summer. Granted, it's not wicker or pastelly or bright like your typical summer bag, but I still think that you can wear it. I know someone asked before about wearing black in the summer, and I remember the general consensus being a yes; damier is like black in that you can wear it like a neutral.