tz-borders.json — data license and attribution
==============================================

The time zone boundary data in tz-borders.json (the file shipped next to this
notice) is a derivative database of:

  timezone-boundary-builder, release 2026c
  https://github.com/evansiroky/timezone-boundary-builder
  (c) OpenStreetMap contributors

That data is made available under the Open Database License (ODbL) 1.0:
  https://opendatacommons.org/licenses/odbl/1-0/

tz-borders.json is itself a derivative database (time zone polygons dissolved
to standard-UTC-offset bands, simplified and quantized for an 800 px world
map by scripts/build-tz-borders.py) and is likewise offered under ODbL 1.0.

This license applies to the DATA FILE tz-borders.json only. It does not
apply to, and does not change the license of, the Zimi source code, which
remains MIT-licensed (see the repository's LICENSE file).

Exact provenance (pinned in scripts/build-tz-borders.py):
  source: timezones-with-oceans-now.geojson.zip from release 2026c
  sha256: 815f5be7f01bd7c4110a1706d9afa4f8d751a6db4fe46c4d5d163941e2c38147
