Here you'll find a selection of perfume oils that are seasonal releases each year. Each will "go live" within their respective seasons and will be moved into their appropriate fragrance catalog categories at that time. At the end of their release, they'll retire once again to The Vault until their season rolls around the following year.
You can peruse this section of the catalog to read about these scents and their dates of availability. As of May 2020, many have been unavailable for quite some time for a variety of reasons and are impatiently awaiting their resurrection dates... as am I.