---
title: "Calendar Round"
method: POST
path: "/mayan/calendar-round"
tags: ["Mayan Calendars"]
---

# Calendar Round

`POST /mayan/calendar-round`

Combined Tzolkin + Haab: unique date label within the 52-year cycle (18,980 days).

## Request body

- MayanDateOnlyInput
  - `date` string, required

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `calendarRound` string, nullable
    - `tzolkin` object, nullable
    - `haab` object, nullable

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

---

[API](https://skmtc.net/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.net/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/529d7d36d7d6/schema)