# days (temporal)

a piece of time that differs from the previous piece by a regular pattern

- Computed level: L4 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: days

## Emergence
**Emerges from:** [time](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-time.dimension), [pattern](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-pattern.regularity), [piece](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-piece.portion), [difference](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-difference.relation), [previous](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-previous.temporal), [regular](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-regular.frequency)

**Through:** as time is segmented into portions, differences between successive portions manifest through a repeating regular pattern, forming a day

**Novel properties:**
- temporal recurrence
- bounded duration with rhythmic boundary
- successive distinction by repetition

## Examples
- Earth completes one rotation every 23.93 hours, defining the sidereal day measured by astronomers at Greenwich Observatory. *(astronomy)*
- The Julian calendar assigned 365 days to a year, adding a leap day every four years starting in 45 BCE. *(history)*
- Unix time counts days as 86400-second intervals since January 1, 1970, resetting at midnight UTC. *(computing)*

## Used by
- [calendar](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-calendar.tool) (L14)
- [daily](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-daily.temporal) (L5)
- [friday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-friday.temporal) (L15)
- [holiday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-holiday.leisure) (L8)
- [monday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-monday.temporal) (L10)
- [month](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-month.temporal) (L13)
- [summer](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-summer.season) (L21)
- [sunday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-sunday.day) (L11)
- [today](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-today.temporal) (L5)
- [tuesday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-tuesday.temporal) (L6)
- [wednesday](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-wednesday.temporal) (L16)
- [week](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-week.temporal) (L5)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-days.temporal*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-days.temporal.json*  
*Every definition provably resolves to space, time, energy and pattern.*