# 13Cal

- **Website:** <https://13cal.net>
- **Primary alias:** `13cal.net`

## Description

13cal.net is an informational website and interactive tool focused on the 13-month calendar, also known as the International Fixed Calendar. This perpetual solar calendar organizes the year into 13 equal months of 28 days, with an additional Year Day and, in leap years, a Leap Day. Its structure keeps dates on the same weekday each year, making months and quarters uniform.

Visitors can explore an interactive calendar, convert Gregorian dates, find their fixed-calendar birthday, and track moon phases. The site explains how the system works, including the added month Sol, positioned between June and July, and compares the fixed calendar with the Gregorian calendar. It also offers guides on the calendar’s history, design, and potential uses in planning and reporting.

For users who want a printed version, 13cal.net sells a $7 digital calendar covering 2026 and 2027. The download includes 26 dated month spreads with marked moon phases, in three printable editions formatted for US Letter and A4 paper.

## Industries

- 🗺 Reference Materials
- 🖥 Computers Electronics and Technology

## Links

- [twitter](https://twitter.com/13Calendar)

## Logos & icons

- logo _(primary)_ — PNG — [download](https://cdn.brandfetch.io/idL5FQ-Vrt/w/722/h/695/theme/dark/logo.png?c=1bxid64Mup7aczewSAYMX&t=1791432927969)
- icon _(primary)_ — JPEG — [download](https://cdn.brandfetch.io/idL5FQ-Vrt/w/400/h/400/theme/dark/icon.jpeg?c=1bxid64Mup7aczewSAYMX&t=1791432928163)

## Colors

| Name | Hex | Theme |
| --- | --- | --- |
| Mountain Meadow | #14b8a6 | accent |
| Mirage | #1e293b | dark |
| Your Pink | #fecaca | light |

## Fonts

- var(--font-display) — asset _(custom)_
- var(--font-body) — asset _(custom)_

## Imagery

- banner _(primary)_ — JPEG — [download](https://cdn.brandfetch.io/idL5FQ-Vrt/w/1500/h/500/idGBE4Z399.jpeg?c=1bxid64Mup7aczewSAYMX&t=1791432927739)

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_Source: <https://brandfetch.com/13cal.net>_
_See [/llms.txt](/llms.txt) for a full list of agent-readable pages, and [/auth.md](/auth.md) for how agents authenticate._