---
name: "mhc"
section: "5"
platform: "linux"
package: "mhc"
version: "1.2.4-6"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mhc/5"
---

# mhc(5)

Message Harmonized Calendaring system

## NAME

mhc - Message Harmonized Calendaring system

## DESCRIPTION

This manual page documents briefly the **mhc** file format. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

## FIELDS

**Mhc** file format is based on STD11/RFC822: Standard for the format  of ARPA Internet text messages.  In **mhc** file, the following extra header fields are used.

- **X-SC-Day:**

  Date of event in format *yyyymmdd*.  You can specify multiple date with space separated like:

  X-SC-Day: 19990409 19990413

-

  which means April 9th 1999 and April 13th 1999.

- **X-SC-Time:**

  Time of event in format  *hh***:***mm***-***hh***:***mm* or *hh***:***mm***.** For event which has no meanings about time, you can leave it empty in this field.

- **X-SC-Duration:**

  Period of event in  *yyyymmdd***-***yyyymmdd***.** You can omit start date or end date, like "19991121-". **X-SC-Duration:** is used only to limit date specified by **X-SC-Day:** or **X-SC-Cond**, so you can't describe event date only by **X-SC-Duration:**.  If **X-SC-Duration:** is empty, it means no limit.

- **X-SC-Cond:**

  Condition of event date by using following keyword.

  *00***-***31* Day of month.

  **1st 2nd 3rd 4th 5th Last** Week in month.

  **Sun Mon ... Sat** Day of week.

  **Jan Feb ... Dec** Month

-

  Examples,

  - X-SC-Cond: Tue Fri

    Every Tuesday and Friday.

  - X-SC-Cond: 31 Aug

    Every August 31th.

  - X-SC-Cond: 1st 3rd Fri

    Every 1st and 3rd Friday.

    - X-SC-Cond: Fri

      X-SC-Day: !19990409

    Every Friday, but except April 9th 1999.

  - X-SC-Cond: Fri 13

    Every 13th and Every Friday, not 13th Friday.

- **X-SC-Alarm:**

  Hint for alarm of event.  Currently, **mhc.el** doesn't alaram, but gemcal will pop-up alarm window.  It will be useful if you transfer this event to PalmOS.  In **X-SC-Alarm:**, you can specify the number (1 to 99) with suffix such as minute, hour or day.  For example,

  - X-SC-Alarm: 10 minutes

    Alarm 10 minutes before event.

  - X-SC-Alarm: 3 hour

    Alarm 3 hours before event.

  - X-SC-Alarm: 3 day

    Alarm 3 day before event.

-

  - **X-SC-Subject:**

  Subject of event. unstructured?

- **X-SC-Location:**

  Location of event. unstructured?

- **X-SC-Category:**

  Category of event.  Any keyword, space separeated.  Case ignored. For example,

  - X-SC-Category:

    - X-SC-Category: todo

    - X-SC-Category: done

    - X-SC-Category: private todo

    - X-SC-Category: work done

    -

  - **X-SC-Record-Id:**

  Internal use only.

## SEE ALSO

[**mhc**(1)](/mhc/1.md).\

## AUTHOR

This program was written by Yoshinari Nomura \<nom@quickhack.net\> and this manual page was written by Fumitoshi UKAI \<ukai@debian.or.jp\>, for the Debian GNU/Linux system (but may be used by others).