Editorial Policy

Our goal is to give correct, easy-to-understand answers. This is how we work.

Accuracy first

• Formulas follow recognised standards (Gregorian calendar, ISO 8601 week numbers, standard percentage and time formulas).
• Every tool is tested with worked examples, including edge cases such as leap years, month ends and midnight crossings.
• Guides link to official or primary sources where rules come from.

Independence

Advertising never influences results or recommendations. Ads are clearly separated from the content.

Updates and corrections

Pages show a "last updated" date. When a reader reports an error, we check it, fix it and update the date. Major corrections are noted on the page.

Languages

Each language version is written for its readers — with local date formats, decimal separators and examples — not just machine-translated.

Last updated: Thursday, October 8, 2026