Day
A day is the time it takes the Earth to spin around once. It is day time on the side of the Earth that is facing the Sun. When it is night time, that side of the Earth is facing away from the Sun. It takes 24 hours for the Earth to spin once, so that is one day, including the day time and night time. This is mean solar time, measured relative to the Sun. There is also sidereal time, measured relative to the fixed stars. The sidereal day is a few minutes shorter.
Parts/periods of the day
[change | change source]Remembering that the hours are in the 24-hour clock system.
In four parts/periods
[change | change source]- Postmidnight, wee hours or small hours: Period from 00:00 until 05:59.
- Morning: Period from 06:00 until 11:59.
- Afternoon: Period from 12:00 until 17:59.
- Evening or night: Period from 18:00 until 23:59.
In two parts/periods
[change | change source]- Daytime: Period from 06:00 until 17:59.
- Nighttime: Period from 18:00 until 05:59.
List of days of the year
[change | change source]* There are only 29 days in February during a leap year. Otherwise, February has 28 days.
| Days of the Week |
|---|
| Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
Related pages
[change | change source]Other websites
[change | change source]- Day -Citizendium
Authority: International System of Units (BIPM) | ||
| Base units |  | |
| Units based on base units | ||
| Other units | ||
| See also | ||
