Roman Timekeeping
Initially, the day was divided into two parts: the ante meridiem (before noon) and the post meridiem (after noon). With the introduction of the Greek sundial to Rome from the Samnites circa 293 BC, the period of the natural day from sunrise to sunset was divided into twelve hours.[1][2][3] Variation[edit] An hour was defined as one twelfth of the daytime, or the time elapsed between sunset and sunrise. Since the duration varied with the seasons, this also meant that the length of the hour changed.
- ▪Initially, the day was divided into two parts: the ante meridiem (before noon) and the post meridiem (after noon).
- ▪With the introduction of the Greek sundial to Rome from the Samnites circa 293 BC, the period of the natural day from sunrise to sunset was divided into twelve hours.[1][2][3] Variation[edit] An hour was defined as one twelfth of the daytim
- ▪Since the duration varied with the seasons, this also meant that the length of the hour changed.
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| Original publisher | Wikipedia |
| Canonical URL | https://en.wikipedia.org/wiki/Roman_timekeeping |
| Publication time | Sat, 19 Sep 2026 10:04:39 +0000 |
| Retrieval time | 2026-09-19T10:43:46.758Z |
| Last seen | 2026-09-19T10:43:46.758Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
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| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
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| Cluster logic | Not yet clustered, or no peer story found in the clustering window. |
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| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Toggle the table of contents Roman timekeeping 5 languages DeutschFrançaisItalianoSimple English中文 Edit links Article Talk English Read Edit View history Tools Tools move to sidebar hide Actions Read Edit View history General What links hereRelated changesUpload filePermanent linkPage informationCite this pageGet shortened URLSwitch to legacy parser Print/export Download as PDFPrintable version In other projects Wikimedia CommonsWikidata item Appearance move to sidebar hide From Wikipedia, the free encyclopedia Hour system with days divided into 24 hours Sundial at the Temple of Apollo (Pompeii) In Roman timekeeping, a day was divided into periods according to the available technology.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Wikipedia.
