Dress Code
The dress code for the Gala dinner is formal black tie.
For all other events, it is informal, casual.
How to Pack for a Trip to Paris in May
May in Paris generally has both brisk and warm days, with average temperatures at around 14degrees C (57 degrees F). Bring light cotton clothes for sunny days, but also pack warm socks and a spring coat.
May is not usually excessively wet, but sudden thunderstorms are common. Pack an umbrella just in case one of these surprises you during a tour.