Packages with open date are those with a specified period for use (ex: December to March). In this case you will need to purchase the package, follow the process described in the topic "How to schedule your trip" and wait for the deadline stipulated for confirmation.
The period for use is found in the package regulation in the tab "How to use".
PACKAGES WITH CLOSED DATE
Closed date packets are those valid for an exact period (ex: Packages for holidays). For these packages, it is not necessary to check availability. Your trip is guaranteed for that date!