Licenses & Attributions
The data and resources that make 123Clock possible, and the terms they are used under.
City & location data
Place names, coordinates, populations and time zones are derived from GeoNames, used under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Changes may have been made to the original data.
Time references
Clock-accuracy checks are made in your browser against public, CORS-enabled time endpoints operated by third parties (including Cloudflare and Akamai). These services are queried at runtime; their data is not redistributed by this site.
Time zone rules
Time zone offsets and daylight-saving transitions come from the IANA Time Zone Database as provided by the platform this site runs on.
Site content
Except where noted above, the design, text and code of 123Clock.online are © 2026 123Clock.online. All rights reserved.
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