When do I have the right to zone-free travel?

You may use all public transport in the Ile-de-France region from Saturday midnight through Sunday 11:59 p.m. (at no extra charge), regardless of the usual zones specified on your travel pass. You may also travel zone-free on bank holidays, during short-term school holidays (Zone C, Ile-de-France school district) and from mid-July to mid-August.