Periods & dates

Every period-bound fact carries all three period representations:

"period": {
  "calendar": "2026Q1",
  "fiscal": "2026Q2",
  "end_date": "2026-03-28",
  "kind": "quarter"
}

kind is one of quarter, annual, ttm, ytd, instant, or forward (guidance). Quants join on calendar; models often join on fiscal.

Query parameters

Param	Notes
`periods`	Repeatable: `periods=2026Q1&periods=2026Q2`. Calendar by default.
`period_basis`	`fiscal` to switch the `periods` filter to fiscal periods.
`start_date` / `end_date`	ISO-8601 date bounds.
`updated_after` / `updated_before`	Delta-sync: only rows changed in a window.