Time Zones by Location: IANA Mappings for Major Global Cities

Mapping fewer than 1,000 major global cities and regions to their primary IANA time zone identifiers, this dataset was released by brandontravel and last updated in March 2026. It provides a structured link between administrative geography and temporal offsets for travel and scheduling applications.

Use Cases

• Resolving user-entered city and region strings to valid IANA timezone strings for calendar scheduling
• Joining external datasets using the iso2 country codes to append local time zone context
• Building travel destination lookups that display the timezone based on the country and city selection

Strengths

• Includes ISO 3166-1 alpha-2 codes for standardized country matching
• Uses standard IANA timezone identifiers compatible with most programming libraries
• CC0 1.0 license allows for unrestricted commercial and private use

Limitations

• Small scale with fewer than 1,000 records
• Lack of latitude and longitude coordinates prevents coordinate-based spatial lookups

Provenance

Source

brandontravel

Freshness

Last updated March 2026.

Geography

Global