Make time for the light

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Report a time that looks wrong, ask a question, or propose a contribution.

Send a message

For a time report: place, date and the value you expected. At least 20 characters, at most three links.

Before you write about a time

Our times assume a flat horizon at sea level and standard refraction, rounded to the nearest minute, so a difference of a minute or two from another service is normal; the methodology page explains why. A difference of several minutes, or a time on the wrong civil date, is worth reporting: tell us the place, the date and the value you expected.

What happens to your message

The form sends your name, e-mail address, subject and message to this server, where they are stored outside the website folder together with a hashed (unreadable) form of your IP address, used only to limit spam. Messages are deleted after 180 days. They are not shared with anyone and not used for marketing. See the privacy policy.

Publisher details (the name and contact address of the person or organisation responsible for this site) will be added here as soon as they have been supplied. Until then, use the contact form.

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Published 25 September 2026 · Updated 25 September 2026 · Times are recalculated live for the date you choose.