Editorial Policy

Editorial principles

• Accuracy — we research, calculate, and cite carefully and correct issues when identified.
• Transparency — methodology, assumptions, and limitations are documented and linked from every relevant page.
• Educational usefulness — content is written to teach, not to manipulate or sensationalize.
• Independence — editorial decisions are not directed by advertisers, affiliate partners, or sponsors.
• Continuous improvement — pages are revisited as standards, legislation, and time zone rules evolve.

How content is produced

• Calculators are implemented against documented algorithms and validated against known reference cases.
• Educational guides are written by human editors and reviewed for clarity, scope, and accuracy.
• Where AI tools assist drafting or explanation, that use is disclosed in our AI Content Disclosure.
• External sources, when cited, are linked or named so readers can verify them.

Review and updates

• Pages affected by legislative or time zone changes are reviewed at least annually and after major changes.
• User-reported issues are triaged through our Corrections Policy.
• Significant changes are reflected in the page's last-updated date.

Separation of editorial and commercial content