The calendar · Seasonal moments · Element
The crowding
How contested the moment already is.
The part
What it is
A moment everybody addresses is expensive to enter and cheap to skip. Knowing which it is decides whether early or absent is the better answer.
The least crowded moments are usually the ones specific to a segment rather than to the category.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.