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EntityQ573· pop 251· linked from 3,214 articles

日

Also known as days, Earth day

時間單位

AI overview

A day is the 24-hour period it takes for Earth to complete one full rotation relative to the Sun, during which a location experiences morning, afternoon, evening, and night. This daily cycle is important because it drives circadian rhythms in many organisms, which are essential to vital life processes.

AI-generated from the Wikipedia summary — may contain errors.

Wikidata facts

Instance of: non-SI unit mentioned in and accepted with the SI
Subclass of: time interval
Part of: week
Has part: sunrise
Image: GreenwUhrWelt.jpg
Said to be same as: nychthemeron
Has parts of class: time of day

Show 15 more facts

Commons category: Day
topic's main category: Category:Days
Commons gallery: Day
conversion to SI unit: 86400
Wikidata time precision: 11
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
unit symbol: 日
equivalent class: dati.beniculturali.it/cis/Day
Wikidata SPARQL query equivalent: wd:Q573 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)
subdivision of this unit: hour
conversion to standard unit: 24
different from: calendar day
exact match: www.w3.org/TR/owl-time/#time:unitDay
topic has template: Template:Parts of a day
P8168: Jee Yong-ju

Sources (4)

via Wikidata · CC0

Article · 中文

日，一般指地球日，是时间单位。 * 时长单位，也称天，大約是地球相對太陽自轉一周之时长，即一晝夜循環。自1967年后，科学上「日」已经由國際度量衡局（BIPM）以原子能階躍遷规定为86400秒。一日 = 24 小时 = 86400秒。 * 时刻单位，也称号，日期的简称，如：今日是2023年1月9日，这里的「日」是指1月第9日。「日」有时指每週的星期日。口语中，「日」或者「天」有时也可能特指白晝，即不包括夜晚之半日時間。

Abstract from DBpedia / Wikipedia · CC BY-SA