A configuration check, not a booking guarantee.

Timezone Slot Proof is a free utility that projects configured availability with the timezone data available in your browser. Use the result as evidence to review—not as a promise that a separate service will behave identically.

Acceptable use

You may use, share, and export results for lawful personal or business purposes. Do not attempt to disrupt the service, introduce malicious files, or misrepresent an exported proof as an audit of a third-party scheduler.

No scheduler integration

The tool does not connect to Calendly, Cal.com, SavvyCal, or any calendar provider. Results do not account for busy events, date overrides, buffers, booking limits, a provider’s timezone database, or provider-specific recurrence logic. Verify important results in the actual booking page.

Availability and warranty

The service is provided “as is” and may change or be unavailable. To the extent permitted by law, the operator disclaims warranties and is not liable for missed meetings, lost bookings, or indirect losses arising from use of the tool.

Your files

You remain responsible for files you open and results you share. Avoid exporting private calendar details; use an availability-only ICS file.

Open-source license

The repository source is available under the MIT License. These service terms govern the hosted utility and do not reduce rights granted by that license.

Effective: 27 August 2026.