Time scales

• YearOne value per year — free to query, no sign-in required.
• MonthOne value per calendar month — also free, no sign-in required.
• DayOne value per calendar day — requires signing in, and spends API credits (see below).

Signed out, Dayshows a lock and can't be selected. Signed in, it shows your current plan badge and, once selected, a live meter for the API credits it's about to spend.

The calendar's granularity follows whichever scale is active — a year picker, a month picker, or a full day-range picker. Switching scales resets the range to a sensible default rather than trying to reinterpret the old one. The default range starts in 2017 rather than working back from today, since the most recent data isn't always available yet.

Cost is simply the number of days in your selected range, inclusive of both ends. A request that would exceed your remaining balance is blocked with a link to Billing instead of running; a request over 1,000 credits asks you to confirm before it fires, so a wide range never spends credits by accident.

The two long-term change cards next to the toggle track your selected location and dataset, but not the time scale or range above them — they always compare two multi-decade normal periods. See the platform for what each one shows.

Full parameter reference, including date formats per scale, in the API key docs.