# Polystash calendars and calculators

> Free public holiday calendars and business-day calculators for 224 countries and territories, with regional calendars where available.

Holiday and business-day pages cover 2000–2060. Country and region URL codes are lowercase. Dates use YYYY-MM-DD. Regional queries include the country's national holidays. Check each page's coverage notes; future source-generated calendars can change. Pages using "today" depend on the current date.

## Calendars and calculations

- [Holiday dataset files and sample](https://polystash.com/holiday-dataset): Compare the free CSV sample, $9 full download and API access; includes a Python working-day calendar walkthrough.
- [Holiday calendar](https://polystash.com/holidays/us/2027): Country and year; for Bavaria use /holidays/de/de-by/2027.
- [Business days between dates](https://polystash.com/business-days/us/2027-03-01/2027-03-31): Working-day count for a date range.
- [Add business days](https://polystash.com/business-days-from/us/2027-03-05/3): Date after a working-day offset.
- [Is a date a business day?](https://polystash.com/is-business-day/us/2027-03-05): Holiday and weekend classification.
- [Working days left in a month](https://polystash.com/working-days-left/us/2027-03): Monthly working-day calculator.
- [Invoice due date](https://polystash.com/due-date/us/2027-03-05/net-30): Calendar-day terms; net-30-business-days selects working-day terms.
- [Days from today](https://polystash.com/days-from-today/30): Calendar-day offset from the current date.
- [Business days from today](https://polystash.com/business-days-from-today/us/30): Country-specific working-day offset.
- [ISO week number](https://polystash.com/week-number): Current week and year.
- [Exchange calendars](https://polystash.com/markets): Trading-day and market-open pages; inspect coverage for the selected exchange.
- [Carrier schedules](https://polystash.com/carriers): US carrier holiday service schedules for the years shown on the site.

## API documentation

- [API guide](https://api.polystash.com/llms.txt): Machine-readable overview of the two live API products.
- [Quick start](https://api.polystash.com/quickstart.md): Customer authentication and request examples.

## Products and access

- [Business Days and Public Holidays](https://rapidapi.com/polystash-polystash-default/api/business-days-and-public-holidays1): Holiday lookup, add/count business days, SLA deadlines and iCalendar feeds. Separate RapidAPI subscription; free tier available.
- [Settlement Calendar and Payment Value Dates](https://rapidapi.com/polystash-polystash-default/api/settlement-calendar-and-payment-value-dates): Exchange sessions, settlement arithmetic and payment cutoffs. Separate RapidAPI subscription; free tier available.
- [API pricing](https://api.polystash.com/pricing): Current plan comparison; confirm quotas and prices on the marketplace before subscribing.
- [Buy the dataset — $9 one-off](https://polystash.gumroad.com/l/public-holidays-business-days-2000-2060): Download holiday data for 2000–2060 as CSV, Parquet and iCalendar files.
- [Free holiday CSV sample](https://www.kaggle.com/datasets/polystash/public-holidays-by-country-and-region-2026-2028): Sample for 2026–2028 with country and regional reference tables.