An astral date is a space where another location can be accessed through an astral entity or place called a gate. Stepping through it will cause one to appear elsewhere, usually directed by where one wishes to go. The transfer only takes a fleeting moment, and gives one the feeling of sinking and floating at the same time.
These gates will not allow one to get lost in them; if you don't know where you're going, it will either not transport you or send you to the closest gate. Large groups can travel through them with only 1 person knowing where they're going, so long as all parties are connected by touch. While at times such gates can be joined with an object and moved, such as when the Lupa leave Xcheamo in the far future, otherwise they will move only to avoid being inside walls and other such structures.