Dictionary term
Time Zone
Direct answer
Time Zone: A Time Zone is a legally or administratively defined region that uses a common civil clock offset and associated local-time rules.
A Time Zone is a region sharing civil clock rules and a UTC relationship.
A Time Zone is a region sharing civil clock rules and a UTC relationship.
A cycle or timeline schematic for comparing the named timekeeping concept.Quick reference
- Use when
- Use named IANA time zones when possible so software can apply historical and daylight-saving transitions rather than relying on a fixed offset.
- Do not use it for
- Do not infer a time zone from longitude alone or treat abbreviations such as CST as globally unique.
- Reference category
- Calendars & Timekeeping
- Related terms
- Calendar, Solar Calendar, Lunar Calendar, Lunisolar Calendar
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The story behind Time Zone
Standard time zones expanded with railways, telegraphy, navigation, and international coordination, but their boundaries remain political as well as geographic.
Time Zone in spiritual tradition
Time zones show that one physical instant can be named differently by different communities without becoming different events.
Time Zone: fact and faith, kept distinct
This is a factual astronomy, calendar, Earth-science, cultural, or historical reference. It can support wonder at the created order without becoming a claim of fate, worship, or private revelation.
Time Zone in numerology
Time Zone is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Time Zone matters
Time zones determine the displayed local date and time of an astronomical event, while the underlying instant remains unchanged.
Time Zone at work: an example
A lunar event near midnight UTC can fall on different local calendar dates in New York and Tokyo.
Where interpretation stops
Time Zone is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- NIST: Local Time Frequently Asked Questions - Official reference for civil time zones and daylight-saving rules.
- NIST: UTC(NIST) Time Scale - Official explanation of Coordinated Universal Time and the U.S. realization UTC(NIST).
- Source
- The Great Almanac Dictionary
- Category
- Calendars & Timekeeping
- Also appears in
- Calendars & Timekeeping
- Aliases
- None listed
- Last updated
- 2026-07-15
View an event in local time
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More in Calendars & Timekeeping
Common questions
What is Time Zone?
A Time Zone is a legally or administratively defined region that uses a common civil clock offset and associated local-time rules.
How is Time Zone used in an almanac?
Use named IANA time zones when possible so software can apply historical and daylight-saving transitions rather than relying on a fixed offset.
What should I avoid when interpreting Time Zone?
Do not infer a time zone from longitude alone or treat abbreviations such as CST as globally unique.
