一日係地球自轉一週嘅時間。萬國標準單位入面,一日定義做 86,400 秒。
一日係日頭加夜晚。
一日有12個時辰,或24個小時,或1,440分鐘,或86,400秒。
但有啲時候,亦有人會將一日理解為淨係日頭,因為「日」亦可解作太陽,地球大部份地區都係只有日頭先有太陽;另外,多數人都係喺日頭返工或者返學嘅,所以一日喺咩意思,就要睇番情況而定喇。
日頭嘅長短,喺一年裏面嘅四季係唔同嘅,呢樣嘢係因為地球嘅軸係傾斜咗大約23.5度嘅。而喺地球唔同嘅緯度,個季節亦都係唔同嘅。
This article uses material from the Wikipedia 粵語 article 日 (曆法), which is released under the Creative Commons Attribution-ShareAlike 3.0 license ("CC BY-SA 3.0"); additional terms may apply (view authors). 呢度嘅所有文字係根據 CC BY-SA 4.0 牌照嘅條款發佈;可能會有附加嘅條款。 Images, videos and audio are available under their respective licenses.
®Wikipedia is a registered trademark of the Wiki Foundation, Inc. Wiki 粵語 (DUHOCTRUNGQUOC.VN) is an independent company and has no affiliation with Wiki Foundation.