Open data · CC BY 4.0

Open time-zone datasets

Small, documented datasets for researchers, educators, journalists and developers. Each file includes its review date, scope and limits.

CSV

and JSON downloads

Global city and IANA reference

83 priority cities with country code, IANA zone, week start and typical weekend.

CSV JSON

Working-hours overlap 2026

8 city pairs on two dates, calculated in 30-minute intervals.

CSV JSON

Licence and citation

Reuse under CC BY 4.0 with attribution to TimeNivo and a link to the corresponding dataset page.

Read the report

Method and primary references

Time-zone results use named IANA zones through the runtime’s internationalization engine. Weekend conventions are planning defaults, not legal advice. Announcement-dependent public holidays require confirmation.

IANA Time Zone Database ↗Unicode CLDR ↗ISO 8601 ↗

Global DST transitions 2026

53 offset changes across 63 distinct IANA zones represented by 83 cities.

CSV JSON Method and report