Terms

These are the terms for using the Whendays website, a set of date calculators for counting business days and listing a country's public holidays. The website needs no account and is free to use, so the terms stay short: use the tool sensibly, and treat its answers as general information, not as advice or a guarantee.

Not legal or financial advice

  • The answers are general date calculations, not legal or financial advice. Whendays counts business days for a country's calendar and lists a year's public holidays; it does not tell you what to do about a specific legal, tax, or financial deadline of your own.
  • For a date that carries consequences, such as a court filing, a contract, or a payment, confirm it against the official source or a qualified professional. Use Whendays to orient yourself, not as the final word.

No warranty

  • Whendays is provided "as is" and "as available", without warranty of any kind, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, accuracy, or non-infringement.
  • It works to keep every holiday list sourced and every count correct, and it returns no business-day answer for a country it has not sourced rather than a guessed one. Even so, it does not promise that any answer is accurate, complete, or current, or that the site is always reachable. Holiday rules change, and records sometimes carry errors, so you rely on the answers at your own risk.

Our liability

  • To the fullest extent the law allows, Whendays is not liable for any loss that follows from using the site or relying on its output.
  • Some liability the law does not let us exclude, and nothing here tries to, including any consumer rights you have under the law of the country where you live.

Using Whendays

  • The website is free to use, for any lawful purpose. Programmatic and commercial API access will be governed by its own terms; see below for the interim rule. Do not try to disrupt, overload, or break the service, and do not use it to do anything unlawful.
  • Do not present Whendays' answers as official or as advice given by Whendays. They are general information, and how far you can trust one depends on the sources described on the About page.
  • Whendays is a general-audience tool, not directed to children. It is not meant for children under 13, and it does not knowingly collect their information.

The API

  • The API is in early access. While we get up and running it is free to use, within the rate limits each response declares.
  • It will get its own terms and license. We have not decided them yet, and nothing here should be read as that decision; when they exist, they will be posted on this page.
  • While in early access there is no compatibility promise: response shapes and error codes may change without a version bump. Until its own terms exist, the same house rules apply to the API: do not disrupt, overload, or break the service, and do not use it for anything unlawful.

Ads and other sites

  • Whendays is funded by ads. They are served by Google, which sets its own cookies, and they are not directed to children. How that data is handled, and the choices you have over it, live in the Privacy notice and the cookie prompt, not in these terms.
  • Whendays links to other sites, including its data sources and the destinations of ads. It does not run those sites and is not responsible for what is on them; following an ad or a link takes you to their terms.

What belongs to whom

  • The Whendays name, the layout and wording of these pages, and the calculators are ours, and our own code is not offered for reuse or redistribution. The pages are built on open-source parts, Pico CSS and Alpine.js among them, which stay under their own licenses and are not claimed as ours.
  • The standards and government records the answers rest on, and the third-party data sources credited on the About page, belong to their own sources, not to Whendays. The dates you calculate are facts, yours to use and to share as calculator links.

Changes to these terms

  • Whendays updates these terms from time to time as the tool changes. The version on this page, with its date, is always the current one, and changes apply going forward only, from when they are posted.

Governing law

  • Whendays is operated from the State of Oregon, in the United States, and these terms are governed by Oregon law. This does not take away the consumer protections you have under the law of your own country.

If part of these terms cannot be enforced

  • If a court finds part of these terms invalid, the rest still applies, and not enforcing a term once does not waive it.

Last updated: 22 July 2026