Calendarific

Worldwide public holidays REST API covering 230+ countries. Calendarific provides national, local, religious, and observance holiday data with localization across many ISO-639 languages. Used for ecommerce scheduling, HR systems, travel planning, payroll, and global operations.

Calendarific publishes 3 APIs on the APIs.io network: Countries API, Holidays API, and Languages API. Tagged areas include Calendar, Public APIs, Holidays, Worldwide, and Localization.

The Calendarific catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Calendarific’s developer surface includes authentication, signup flow, pricing, support, tooling, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

61.5/100 strong ▬ flat Agent 38/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

3 APIs 7 Features 6 Use Cases

CalendarPublic APIsHolidaysWorldwideLocalization

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 61.5/100 · strong

Contract Quality 18.9 / 25

Developer Ergonomics 8.7 / 20

Commercial Clarity 16.8 / 20

Operational Transparency 0.7 / 13

Governance 8.3 / 12

Discoverability 8.2 / 10

Agent readiness — 38/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/calendarific: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

Calendarific Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Calendarific Finops

FINOPS

Features 7

Notable capabilities this provider offers.

230+ Countries

Coverage of national holidays across more than 230 countries.

Multi-Language Localization

Holiday names and descriptions in many ISO-639 languages (premium).

Holiday Type Filtering

Filter by national, local, religious, or observance categories.

Sub-Region Filtering

Filter by ISO-3166-2 state or region codes.

Historical and Future Data

Holidays from historical years through 2049.

CSV and XLS Export

Download holiday data as flat files in addition to API access.

Multiple API Keys

Multiple keys per account for environment separation.

Scroll for all 7

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

Examples 3

Example request and response payloads for these APIs.

AGENTIC

Use Cases 6

What developers build with this provider.

Ecommerce Scheduling

Plan promotions, shipping cutoffs, and customer service hours around local holidays.

HR and Payroll

Populate localized leave calendars and statutory holiday pay.

Travel Planning

Surface holiday windows that affect bookings, demand, and pricing.

Workforce Scheduling

Plan global team staffing around local public holidays.

Calendar Sync

Hydrate enterprise calendars (Google, Outlook) with localized holidays.

Financial Markets

Identify country-specific trading and settlement closures.

Integrations 4

Pre-built integrations with other platforms and tools.

Google Calendar

Imported holiday data into Google Calendar via custom calendars.

Microsoft Outlook

Hydrate Outlook calendars with localized holiday events.

Home Assistant

Community Home Assistant sensor uses Calendarific as a data source.

ETL Pipelines

Community ETL examples using Python, SQLite, and Apache Airflow.

Solutions 2

Packaged solutions this provider offers.

Developer API

REST API for embedding holiday data into apps and services.

Data Downloads

CSV and XLS bulk exports for analytics and offline use.

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Signup

Signup

Login

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

Vocabulary

Vocabulary

Build 11

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

SDKs

SDKs

SDKs

SDKs

SDKs

SDKs

SDKs

SDKs

Tools

Scroll for all 11

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

Plans

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: calendarific
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/calendarific.png
name: Calendarific
description: Worldwide public holidays REST API covering 230+ countries. Calendarific provides national, local, religious,
  and observance holiday data with localization across many ISO-639 languages. Used for ecommerce scheduling, HR systems,
  travel planning, payroll, and global operations.
url: https://calendarific.com/
specificationVersion: '0.20'
created: '2026-05-28'
modified: '2026-05-29'
x-source: public-apis/public-apis
x-category: Calendar
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
- Calendar
- Public APIs
- Holidays
- Worldwide
- Localization
apis:
- aid: calendarific:calendarific-countries-api
  name: Calendarific Countries API
  description: List supported countries and their ISO codes.
  humanURL: https://calendarific.com/api-documentation
  baseURL: https://calendarific.com/api/v2
  tags:
  - Countries
  properties:
  - type: OpenAPI
    url: openapi/calendarific-countries-api-openapi.yml
  - type: Documentation
    url: https://calendarific.com/api-documentation
  - type: APIReference
    url: https://calendarific.com/api-documentation
  - type: JSONSchema
    url: json-schema/calendarific-holiday-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-country-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-language-schema.json
  - type: JSONStructure
    url: json-structure/calendarific-holiday-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-country-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-language-structure.json
  - type: JSONLD
    url: json-ld/calendarific-context.jsonld
  - type: Examples
    url: examples/calendarific-list-holidays-example.json
  - type: Examples
    url: examples/calendarific-list-countries-example.json
  - type: Examples
    url: examples/calendarific-list-languages-example.json
  - type: Authentication
    url: https://calendarific.com/api-documentation
  - type: RateLimits
    url: rate-limits/calendarific-rate-limits.yml
- aid: calendarific:calendarific-holidays-api
  name: Calendarific Holidays API
  description: Retrieve holiday data for any country and year.
  humanURL: https://calendarific.com/api-documentation
  baseURL: https://calendarific.com/api/v2
  tags:
  - Holidays
  properties:
  - type: OpenAPI
    url: openapi/calendarific-holidays-api-openapi.yml
  - type: Documentation
    url: https://calendarific.com/api-documentation
  - type: APIReference
    url: https://calendarific.com/api-documentation
  - type: JSONSchema
    url: json-schema/calendarific-holiday-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-country-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-language-schema.json
  - type: JSONStructure
    url: json-structure/calendarific-holiday-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-country-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-language-structure.json
  - type: JSONLD
    url: json-ld/calendarific-context.jsonld
  - type: Examples
    url: examples/calendarific-list-holidays-example.json
  - type: Examples
    url: examples/calendarific-list-countries-example.json
  - type: Examples
    url: examples/calendarific-list-languages-example.json
  - type: Authentication
    url: https://calendarific.com/api-documentation
  - type: RateLimits
    url: rate-limits/calendarific-rate-limits.yml
- aid: calendarific:calendarific-languages-api
  name: Calendarific Languages API
  description: List supported languages and their ISO codes.
  humanURL: https://calendarific.com/api-documentation
  baseURL: https://calendarific.com/api/v2
  tags:
  - Languages
  properties:
  - type: OpenAPI
    url: openapi/calendarific-languages-api-openapi.yml
  - type: Documentation
    url: https://calendarific.com/api-documentation
  - type: APIReference
    url: https://calendarific.com/api-documentation
  - type: JSONSchema
    url: json-schema/calendarific-holiday-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-country-schema.json
  - type: JSONSchema
    url: json-schema/calendarific-language-schema.json
  - type: JSONStructure
    url: json-structure/calendarific-holiday-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-country-structure.json
  - type: JSONStructure
    url: json-structure/calendarific-language-structure.json
  - type: JSONLD
    url: json-ld/calendarific-context.jsonld
  - type: Examples
    url: examples/calendarific-list-holidays-example.json
  - type: Examples
    url: examples/calendarific-list-countries-example.json
  - type: Examples
    url: examples/calendarific-list-languages-example.json
  - type: Authentication
    url: https://calendarific.com/api-documentation
  - type: RateLimits
    url: rate-limits/calendarific-rate-limits.yml
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/calendarific/overview
- type: AgenticAccess
  url: agentic-access/calendarific-agentic-access.yml
- type: DomainSecurity
  url: security/calendarific-domain-security.yml
- type: Authentication
  url: authentication/calendarific-authentication.yml
- type: Website
  url: https://calendarific.com/
- type: DeveloperPortal
  url: https://calendarific.com/api-documentation
- type: Signup
  url: https://calendarific.com/signup
- type: Login
  url: https://calendarific.com/login
- type: Pricing
  url: https://calendarific.com/pricing
- type: Plans
  url: plans/calendarific-plans-pricing.yml
- type: RateLimits
  url: rate-limits/calendarific-rate-limits.yml
- type: TermsOfService
  url: https://calendarific.com/terms
- type: PrivacyPolicy
  url: https://calendarific.com/privacy
- type: Support
  url: https://calendarific.com/contact
- type: Contact
  url: https://calendarific.com/contact
- type: GitHubOrganization
  url: https://github.com/calendarific
- type: SDKs
  name: Python SDK
  url: https://github.com/calendarific/python-calendarific
- type: SDKs
  name: Node.js SDK
  url: https://github.com/calendarific/node-calendarific
- type: SDKs
  name: PHP SDK
  url: https://github.com/calendarific/php-calendarific
- type: SDKs
  name: Ruby SDK
  url: https://github.com/calendarific/ruby-calendarific
- type: SDKs
  name: Go SDK
  url: https://github.com/calendarific/go-calendarific
- type: SDKs
  name: .NET SDK (community)
  url: https://github.com/guibranco/calendarific-sdk-dotnet
- type: SDKs
  name: PowerShell wrapper (community)
  url: https://github.com/rchaganti/PSCalendarific
- type: SDKs
  name: Elixir wrapper (community)
  url: https://github.com/Bounceapp/elixir-calendarific
- type: SpectralRules
  url: rules/calendarific-rules.yml
- type: Vocabulary
  url: vocabulary/calendarific-vocabulary.yml
- type: Tools
  name: Calendarific MCP Server (community)
  url: https://github.com/noalimoy/calendarific-mcp-server
- type: Features
  data:
  - name: 230+ Countries
    description: Coverage of national holidays across more than 230 countries.
  - name: Multi-Language Localization
    description: Holiday names and descriptions in many ISO-639 languages (premium).
  - name: Holiday Type Filtering
    description: Filter by national, local, religious, or observance categories.
  - name: Sub-Region Filtering
    description: Filter by ISO-3166-2 state or region codes.
  - name: Historical and Future Data
    description: Holidays from historical years through 2049.
  - name: CSV and XLS Export
    description: Download holiday data as flat files in addition to API access.
  - name: Multiple API Keys
    description: Multiple keys per account for environment separation.
- type: UseCases
  data:
  - name: Ecommerce Scheduling
    description: Plan promotions, shipping cutoffs, and customer service hours around local holidays.
  - name: HR and Payroll
    description: Populate localized leave calendars and statutory holiday pay.
  - name: Travel Planning
    description: Surface holiday windows that affect bookings, demand, and pricing.
  - name: Workforce Scheduling
    description: Plan global team staffing around local public holidays.
  - name: Calendar Sync
    description: Hydrate enterprise calendars (Google, Outlook) with localized holidays.
  - name: Financial Markets
    description: Identify country-specific trading and settlement closures.
- type: Integrations
  data:
  - name: Google Calendar
    description: Imported holiday data into Google Calendar via custom calendars.
  - name: Microsoft Outlook
    description: Hydrate Outlook calendars with localized holiday events.
  - name: Home Assistant
    description: Community Home Assistant sensor uses Calendarific as a data source.
  - name: ETL Pipelines
    description: Community ETL examples using Python, SQLite, and Apache Airflow.
- type: Solutions
  data:
  - name: Developer API
    description: REST API for embedding holiday data into apps and services.
  - name: Data Downloads
    description: CSV and XLS bulk exports for analytics and offline use.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Calendarific

APIs 3

Postman Collections 3

Open Collections 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Features 7

230+ Countries

Multi-Language Localization

Holiday Type Filtering

Sub-Region Filtering

Historical and Future Data

CSV and XLS Export

Multiple API Keys

Semantic Vocabularies 1

Spectral Rules 2

JSON Schema 3

JSON Structure 3

Examples 3

Security Posture 2

Agentic Access 1

Use Cases 6

Ecommerce Scheduling

HR and Payroll

Travel Planning

Workforce Scheduling

Calendar Sync

Financial Markets

Integrations 4

Google Calendar

Microsoft Outlook

Home Assistant

ETL Pipelines

Solutions 2

Developer API

Data Downloads

Get Started 3

Agent Surfaces 1

Design & Contract 2

Build 11

Access & Security 2

Operate 3

Commercial 4

Company 1

Source (apis.yml)