Dates and time zones

Date windows

Results cover every period the experiment ran, with paused periods left out. To look at a narrower window, send both dates:

?startDate=2026-09-01&endDate=2026-09-14&timeZoneName=America/New_York

• Dates are YYYY-MM-DD, both days included in full.

• timeZoneName is an IANA time zone. Without it, dates are in UTC.

• Paused days inside the window stay excluded. period.dateRanges in the response shows the periods actually used.

/store/overview takes the same two dates with its own defaults and limits.

Timestamps

Timestamps in responses (createdAt, startingAt and so on) are ISO 8601 in UTC, like 2026-09-01T10:00:00.000Z.

Timeseries buckets

/timeseries splits the window into buckets aligned to the time zone you send, and each point is keyed by the moment its bucket starts. The bucket size, the modes and what to watch out for are on the timeseries page.