Civil day: Difference between revisions
From Glossary of Meteorology
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|Display title=civil day | |||
{{ | |Definitions={{Definition | ||
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|Meaning=A [[mean solar day]] reckoned from midnight to midnight, usually divided into two 12- hour divisions, although now often regarded as a single 24-hour series. | |||
|Explanation=As practically applied by use of [[meridional]] time zones of approximately 15° width, civil time is accurate (relative to mean solar time) to within ±30 minutes, or 7½° of longitude. Minor exceptions occur when the time zones have been established according to geopolitical considerations, rather than adhering strictly to the meridians. <br/>''See'' [[apparent solar day]], [[day]]. | |||
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Latest revision as of 10:20, 26 March 2024
A mean solar day reckoned from midnight to midnight, usually divided into two 12- hour divisions, although now often regarded as a single 24-hour series.
As practically applied by use of meridional time zones of approximately 15° width, civil time is accurate (relative to mean solar time) to within ±30 minutes, or 7½° of longitude. Minor exceptions occur when the time zones have been established according to geopolitical considerations, rather than adhering strictly to the meridians.
See apparent solar day, day.