calendar - Writes reminder messages to standard output
Interfaces documented on this reference page conform to industry standards as follows:
calendar: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
[Compaq] Calls calendar for all users who have a calendar file in their home directories and sends reminders by mail.
The calendar command reads a file named calendar in your current (usually home) directory and writes to standard output any line in the file that contains the current date or the next day's date.
The calendar command recognizes date formats such as Dec. 7 or 12/7. It also recognizes the special character * (asterisk) to match any month. For example, it interprets */7 or * 7 as the seventh day of every month.
On Fridays, calendar writes all lines containing the dates for Friday, Saturday, Sunday, and Monday. It does not recognize holidays, so if the next day is a holiday calendar prints lines for that day, rather than for the next working day.
For you to get reminder service when other users run
file must be readable by others
utility is marked to be withdrawn from
a future issue of the XPG4 and XPG4-UNIX standards.
The following exit values are returned:
An error occurred.
To display information in the calendar file that pertains to today and tomorrow, enter: calendar A typical calendar file might look like this:
The following environment variables affect the execution of
[Compaq] If this variable is set, the
command uses its value as the full pathname of a template file that contains
format strings. The strings consist of field descriptors and text characters
which are used to provide a more robust set of allowable date formats in different
languages using the appropriate settings of the environment variables
for more information. The list of allowable field descriptions
is provided in the
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contain an invalid setting, the
utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides the values of
all the other internationalization variables.
Determines the locale for the interpretation of sequences
of bytes of text data as characters (for example, single-byte as opposed to
multibyte characters in input files).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the format of date strings recognized by the
Determines the location of message catalogues for the processing
Contains user calendar entries.
Contains user information.
Commands: chmod(1), date(1), mail(1), mailx(1)