---
title: "Changes to Create a holiday calendar"
method: POST
path: "/api/v2/holiday_calendars"
---

# Changes to Create a holiday calendar

`POST /api/v2/holiday_calendars`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 49 revisions.

- **2026-11-02** `fa3060fd0144`: 3 warning, 9 info
- **2026-10-27** `f11a8740641a`: 2 breaking, 1 warning, 6 info

## Changes

- **2026-11-02** `fa3060fd0144`: 3 warning, 9 info
  - added the new `bad_decimal_format` enum value to the `errors/items/code` response property for the response status `422`
  - added the new `non_finite_number` enum value to the `errors/items/code` response property for the response status `422`
  - added the new `null_bytes_in_params` enum value to the `errors/items/code` response property for the response status `422`
  - added the non-success response with the status `400`
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`
  - added the non-success response with the status `406`
  - added the non-success response with the status `408`
  - added the non-success response with the status `415`
  - added the non-success response with the status `423`
  - added the non-success response with the status `429`
  - added the non-success response with the status `500`
- **2026-10-27** `f11a8740641a`: 2 breaking, 1 warning, 6 info
  - the `data/attributes/country` response's property type changed from `string` to no type for status `201`
  - the `data/attributes/state` response's property type changed from `string` to no type for status `201`
  - deleted the `header` request parameter `X-Organization-Id`
  - added `#/components/schemas/_single_linkage_nullable` to the `data/relationships/organization` response property `anyOf` list for the response status `201`
  - added `#/components/schemas/country, subschema #2` to the `data/attributes/country` response property `anyOf` list for the response status `201`
  - added `#/components/schemas/state, subschema #2` to the `data/attributes/state` response property `anyOf` list for the response status `201`
  - removed `subschema #1: Single data` from the `data/relationships/organization` response property `anyOf` list for the response status `201`
  - the response property `data/relationships/organization/anyOf[subschema #2: Not included]/meta` became required for the status `201`
  - the response property `data/relationships/organization/anyOf[subschema #2: Not included]/meta/included` became required for the status `201`
  - …this revision’s changelog is incomplete

---

[Operation](https://skmtc.dev/productive/apis/api-documentation/docs/api/v2/holiday_calendars/post.md) - [API](https://skmtc.dev/productive/apis/api-documentation.md) - [Page](https://skmtc.dev/productive/apis/api-documentation/changes/api/v2/holiday_calendars/post)