Crafting Session
A crafting session represents all player interactions to use his stored Design Points to prepare, design and produce new assets.
A player may end a crafting session whenever he sees fit, and resume it whenever he feels like it.
However, it is called such because some crafting intermediate assets are to last only until the start of the next Colonization Day.
This is usually the case of intermediate “prepared assets” made during a crafting session and to use in a final production.
This means that if you made them during your crafting session you should use them or accept to lose them when a new Colonization Day begins.