week-expanded-basic.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "ISO 8601-1:2019 Week Date Expanded (Basic Format)",
  "description": "An expanded representation of a week date in basic format [±][YYYYYY][\"W\"][WW][D] with six digits for the year, WW as calendar week of year (01-53), and D as calendar day of week (1-7) (§5.2.4.3 a)",
  "$comment": "https://www.iso.org/standard/70907.html",
  "examples": [
    "+001985W155",
    "-000001W011",
    "+999999W537",
    "+000000W011",
    "-010000W527"
  ],
  "x-license": "https://github.com/sourcemeta/std/blob/main/LICENSE",
  "type": "string",
  "pattern": "^[+-][0-9]{6}W(0[1-9]|[1-4][0-9]|5[0-3])[1-7]$"
}