The Écomusée d'Alsace is generally open all year round, with opening times varying according to the season. However, some parts of the ecomuseum may be closed during the winter season, or in the less busy months. It is therefore advisable to check specific opening times before planning your visit. As for the Butterfly Garden, it is often open during the summer period, from spring to autumn, when weather conditions are more favorable for free-ranging butterflies. However, since butterflies have a short life cycle, the garden may be open for a more limited period during the butterfly season. It's always a good idea to check museum opening times before planning your visit, to make sure they're open during your stay in Alsace. Open-air museums offer unique and enriching experiences, and are well worth including in your travel itinerary when exploring this beautiful region of France.