The requested start. A park-local day comes back verbatim (YYYY-MM-DD); an instant comes back NORMALISED to UTC whole seconds (2026-09-13T14:00:00Z), so an offset or sub-second precision you sent is not echoed back. On a day-granular endpoint such as /history/daily this is ALWAYS a park-local day, even when you asked with an instant: that endpoint's rows are whole days and cannot be sliced finer, so echoing your instant back would claim a precision the data does not have.
to
to:string
The requested end, in the same form as from, and normalised the same way. Omitted instants default to now; omitted days default to today, park-local. The same day-granular rule as from applies on /history/daily.
The requested start. A park-local day comes back verbatim (YYYY-MM-DD); an instant comes back NORMALISED to UTC whole seconds (2026-09-13T14:00:00Z), so an offset or sub-second precision you sent is not echoed back. On a day-granular endpoint such as /history/daily this is ALWAYS a park-local day, even when you asked with an instant: that endpoint's rows are whole days and cannot be sliced finer, so echoing your instant back would claim a precision the data does not have.