Word origin · etymology
Descriptive English compound.
Zone means a belt or region; time zone names a region sharing civil-time rules, not necessarily one unchanging offset.
How we know · epistemology
Historical civil rules
A zone database records political clock rules, including changes over time. These records can be revised, especially for older dates; a present-day offset is insufficient for historical conversion.
Connected concepts
Read alongside this entry
Terms used in this explanation
Mentioned in 12 other entries
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.