# The ring had 365 holes, one per day of the Egyptian civil year.

> Most likely: The ring had 365 holes, one per day of the Egyptian civil year.

Source: https://mysteriesdept.com/mysteries/antikythera-mechanism/answers/ANS0D3FQ6966WEZ/the-ring-had-365-holes-one-per-day-of-the-egyptian-civil  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Antikythera Mechanism](https://mysteriesdept.com/mysteries/antikythera-mechanism)[How many divisions did the front calendar ring have?](https://mysteriesdept.com/mysteries/antikythera-mechanism/questions/QST0D3FQ5244P7K/how-many-divisions-did-the-front-calendar-ring-have)Answer

Answer · Antikythera Mechanism

# The ring had 365 holes, one per day of the Egyptian civil year.

The ring had 365 holes, one per day of the Egyptian civil year.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests partly supported it: one piece of evidence for, two against. It needs two reviews to be accepted.

## What it predicts

- The mean hole spacing on the surviving arc, with the ring radius, extrapolates to 365 within error.
- The Egyptian month names on the ring divide it into twelve 30-day months plus five days.

## What would rule it out

- The surviving hole spacing and radius exclude 365 at high confidence under a model that accounts for corrosion and fractures.

## Evidence 1 for · 2 against

[The ring carries Egyptian month names, which belong to a 365-day calendar, and the 2025 front-dial…](https://mysteriesdept.com/mysteries/antikythera-mechanism/evidence/EVD0D3FQ6H01NGJ/the-ring-carries-egyptian-month-names-which-belong-to-a-365)

Suggestive

FOR

[A Bayesian fit to the 81 hole positions finds 365 not plausible and 360 strongly disfavoured.](https://mysteriesdept.com/mysteries/antikythera-mechanism/evidence/EVD0D3FQ6RT3GS3/a-bayesian-fit-to-the-81-hole-positions-finds-365-not)

Supported

AGAINST

[A least-squares re-analysis puts the chance of 365 below one in ten thousand.](https://mysteriesdept.com/mysteries/antikythera-mechanism/evidence/EVD0D3FQ70M3MA5/a-least-squares-re-analysis-puts-the-chance-of-365-below-one)

Supported

AGAINST

## The questions it answers

[How many divisions did the front calendar ring have?](https://mysteriesdept.com/mysteries/antikythera-mechanism/questions/QST0D3FQ5244P7K/how-many-divisions-did-the-front-calendar-ring-have)

Most likelyThe ring had 354 holes, a lunar year, so the Egyptian calendar ring sat over a lunar-year scale

## Cite it

```
Mysteries Department. (2026). The ring had 365 holes, one per day of the Egyptian civil year. [Answer ANS0D3FQ6966WEZ]. https://mysteriesdept.com/r/ANS0D3FQ6966WEZ
```

Key

**ANS** 0D3FQ6966WEZ

Kind

Answer · hypothesis

Origin

Published

Version

1

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