Mesori
twelfth month of the Coptic calendar

Mesori (Coptic: Ⲙⲉⲥⲱⲣⲓ, Masōri) is the twelfth month of the ancient Egyptian and Coptic calendars.
It is identical to Nahase (Amharic: ነሐሴ, Nähase) in the Ethiopian calendar.
Name
The ancient and Coptic month is also known as Mesore (Ancient Greek: Μεσορή, Mesorḗ).
In ancient Egypt, the months were variously described. Usually, the months of the lunar calendar were listed by their placement in the seasons related to the flooding of the Nile, so that Mesori is most commonly described as the fourth month of the season of the Harvest (4 Šmw), variously transliterated as IV Shemu or Shomu. These lunar months were also named after their most important feasts, so that Mesori was also known as the "Opening" or "Opener of the Year" (Wp Rnpt) or Wep Renpet. The month was also personified as the deity of its festival, which in late sources is given as Ra-Horakhty (Rꜥ Ḥr Ꜣḫty, "Ra–Horus of the Horizons").
The solar civil calendar borrowed the festivals of the earlier lunar calendar, though sometimes under other names. These festival names are increasingly attested after Egypt's Persian occupation. The most common name continued to be the "Opening of the Year", although its little-attested synonym "Birth of the Sun" (Mswt Rꜥ) or Masut Ra became the namesake of the Ptolemaic Greek and Coptic month.
Begin with the source’s own compact description: “Mesori” is twelfth month of the Coptic calendar. The dossier treats that line as a proposition to test through Mesori, twelfth and month, not as a finished interpretation.
Why this record matters
The phrase “twelfth month of the Coptic calendar” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jul 14, 2026. The linked authority identifier is Q1621298.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Mesori”, its source revision and the description used here.
- Expand the search: follow Mesori primary sources, Mesori archive and Mesori research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Mesori”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Mesori” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.