Contact

Day Calculator is a small set of free, browser-based date and time tools. Values you enter stay on this device, so we cannot recover a past calculation, reset an account, or look up a previous result.

Site support

Email support@daycalculator.tools for a calculation that looks wrong, an accessibility issue, or a question about the site. We do not offer personal legal, payroll or professional advice, and we cannot recover calculator inputs because they never leave your device.

What to include

Send the calculator URL, the values you entered if you are reporting a calculation issue, and what you expected to see. This site has no user accounts, so do not send passwords or other credentials.

Privacy and advertising

The privacy page explains local calculation, Google Analytics and AdSense. Questions about those disclosures can use the same site mailbox.