## Pages

### Time of Day

Time of day is distinguished from time interval in that the former is a measurement of the specific interval from the beginning of a given day (such as "I started work at 8 o'clock") whereas the latter relates to the measurement of any interval of time (such as "I worked 8 hours today") regardless of when it started.
Standard time of day divides the day into 24 parts called hours, which are each further divided into 60 minutes.
Decimal time of day divides the day into decimal fractions, rather than 24ths. It has been used several times in history, and is used today mainly by astronomers and computer programmers.

## Fractional Day

Although there have been decimal time proposals which are based upon decimally dividing other fractions of the day (1/20, 1/24, 1/25, 1/40), most divide the day by 10, 100, 1000, etc. When used on this site, decimal time of day refers specifically to the representation of the fractional day. Thus, the fractional day of .987 is represented in French Decimal Time as 9h87 and in Swatch's Internet Time as @987. (Although they may use different time zones.)