# Regional Week, Calendar and Measurement Conventions

Resolved first-weekday, weekend, calendar preference, paper-size and measurement defaults for each ISO territory.

## Contents

| File | Records | Format |
|---|---:|---|
| regional-conventions.json | 249 | JSON array |

The download contains the populated data, a field dictionary, source metadata, reuse terms, a change log and file digests. It contains no scripts, libraries, executables or conversion tools.

## Coverage

Resolved reference conventions for every territory in the included ISO 3166-1 snapshot. CLDR world defaults are applied explicitly and their use is recorded. Calendar preferences and weekends are locale conventions, not public-holiday calendars or universal work schedules.

## Sources and dates

- [Unicode CLDR](https://raw.githubusercontent.com/unicode-org/cldr-json/48.2.1/cldr-json/cldr-core/supplemental/weekData.json): 48.2.1. Retrieved 2026-09-08T02:02:41.749561+00:00.
- [Unicode CLDR](https://raw.githubusercontent.com/unicode-org/cldr-json/48.2.1/cldr-json/cldr-core/supplemental/measurementData.json): 48.2.1. Retrieved 2026-09-08T02:02:41.944971+00:00.
- [Unicode CLDR](https://raw.githubusercontent.com/unicode-org/cldr-json/48.2.1/cldr-json/cldr-core/supplemental/calendarPreferenceData.json): 48.2.1. Retrieved 2026-09-08T02:02:42.273148+00:00.
- [iso-codes](https://raw.githubusercontent.com/sailfishos-mirror/iso-codes/main/data/iso_3166-1.json): retrieved snapshot. Retrieved 2026-09-08T02:02:39.334488+00:00.

## Read the data

JSON tables are arrays of records. GeoJSON files are FeatureCollections, with data fields under each feature’s properties. `data-dictionary.json` defines the fields, units, nulls and observed types. `metadata.json` supplies primary keys and source hashes. Preserve identifiers as text and distinguish missing values from zero.

## Example record

This is an actual record from the data. For map layers, the example shows properties; the downloaded GeoJSON also contains the complete geometry.

```json
{
  "territory_code": "AD",
  "first_day": "mon",
  "weekend_start": "sat",
  "weekend_end": "sun",
  "minimum_week_days": 4,
  "measurement_system": "metric",
  "paper_size": "A4",
  "calendar_preferences": [
    "gregorian"
  ],
  "temperature_system": "metric",
  "world_default_fields": [
    "weekend_start",
    "weekend_end",
    "measurement_system",
    "paper_size",
    "calendar_preferences"
  ]
}
```

## Reuse terms

Unicode-3.0. Copyright Unicode, Inc. and contributors. Derived from Unicode CLDR JSON release 48.2.1. Normalized by Arcomm on 2026-09-08.

[Publisher terms](https://www.unicode.org/license.txt). License notices are included where supplied.

## Tracking changes

Compare by territory_code after CLDR or ISO table changes; preserve which values were inherited from world defaults.

This publication is a snapshot. No automatic refresh is scheduled. New imports must preserve their source version, retrieval date and hashes, then publish a new Arcomm revision.

## Download

[Download the file](/files/e3994343b9c4c82b49ddb40bfe1e1b430a8c1d14d3b377755d368ad97ddac42f)

SHA-256: `e3994343b9c4c82b49ddb40bfe1e1b430a8c1d14d3b377755d368ad97ddac42f`

Size: 17468 bytes.

## Revisions

[Revision history](/agent/docs/regional-conventions/history)