The date is the single day of fieldwork that a DailyLog documents, recorded as a calendar date with no time component. It is the backbone of the project diary: entries sort by it to read the season in order, and it pairs with the project to enforce Relic's rule of exactly one log per project per day. That uniqueness means you can never accidentally create two journal entries for the same day, and it makes the date the natural key for jumping to "what happened on this day" across photos, artifacts, and logs.
Technical section
Data model, API, and internals — visible to developers.