Privacy Policy

1. Processing that stays in your browser

1. The Site's calculation features (days and business days, age, currency conversion, countdown) all run in your browser. Dates, birth dates and amounts you enter are never sent to the operator's server.
2. The operator has no mechanism to receive or store what you enter.

2. Settings stored in your browser

1. The Site stores the following settings in your browser's storage (localStorage): display language (Japanese, Korean, English, Traditional Chinese or Thai), display theme (light or dark), whether Korean holidays are shown, the date of birth entered in the age calculator, which side cards you have collapsed on wide screens, and how many times the on-screen hints have been shown.
2. These are stored only on your device and are never sent to the operator or any third party.
3. The date of birth is deleted when you clear the age calculator field. All settings can also be deleted with your browser's site-data controls.

3. Access logs

1. The server that delivers the Site may record access logs (IP address, browser type, referrer URL, access time) as part of normal communication.
2. Access logs are used only to prevent abuse, investigate failures and understand usage in aggregate, without identifying individuals.

4. Advertising and cookies

1. The Site displays advertisements through Google AdSense, provided by Google LLC. Google and other third-party vendors may use cookies to serve ads based on your prior visits.
2. In the course of ad delivery, the URL of the page you are viewing, browser information and your IP address are sent to Google and to third parties participating in ad auctions. Their handling of this information is governed by their own privacy policies.
3. You can opt out of personalized advertising in Google Ads Settings, and out of third-party vendors' cookies at www.aboutads.info.
4. For details on how Google uses cookies, see Google's advertising policies.

5. Analytics

The Site currently uses no analytics tools. If any are introduced, this policy will be revised and the change announced.

6. Links to external sites

The Site may contain links to external sites. Their handling of information is governed by their own policies, for which the operator is not responsible.

7. Contact form

1. The contact form uses Google Forms, provided by Google LLC. What you write in the form, and the email address you may optionally provide, are sent to and stored on Google's servers and read by the operator.
2. Submissions are used only to answer your inquiry and to improve the Site. They are not used for other purposes and are not passed to third parties. Providing an email address is optional; without one we cannot reply.
3. Handling of the data on Google's side follows Google's Privacy Policy.

8. Disclosure to third parties

The operator does not provide collected information to third parties except where required by law or to protect a person's life, body or property. Transmission in connection with advertising is as described in Article 4.

9. Changes to this policy

The operator may revise this policy in response to changes in law or in the Site. Revised policies take effect when posted on the Site, and the effective or revision date on this page is updated.

10. Contact

Inquiries about information handling:
Contact form