CALENDAR(1) FreeBSD General Commands Manual CALENDAR(1)
NAME
calendar - reminder service
SYNOPSIS
calendar [-A num] [-a] [-B num] [-D moon|sun] [-d] [-F friday]
[-f calendarfile] [-l longitude] [-t dd[.mm[.year]]] [-U
UTC-offset] [-W num]
DESCRIPTION
The calendar utility checks the current directory for a file named
calendar and displays lines that fall into the specified date range. On
the day before a weekend (normally Friday), events for the next three
days are displayed.
The following options are available:
-A num Print lines from today and the next num days (forward, future).
-a Process the ``calendar'' files for users found in /etc/passwd and
mail the results to them. This can result in multiple messages
for specific files, since /etc/passwd does not require home
directories to be unique. In particular, by default root, toor
and daemon share the same home directory. If this directory
contains calendar information, calendar will process the file
three times.
This option requires super-user privileges.
-B num Print lines from today and the previous num days (backward,
past).
-D moon|sun
Print UTC offset, longitude and moon or sun information.
-d Debug option: print current date information.
-F friday
Specify which day of the week is ``Friday'' (the day before the
weekend begins). Default is 5.
-f calendarfile
Use calendarfile as the default calendar file.
-l longitude
Perform lunar and solar calculations from this longitude. If
neither longitude nor UTC offset is specified, the calculations
will be based on the difference between UTC time and localtime.
If both are specified, UTC offset overrides longitude.
-t dd[.mm[.year]]
For test purposes only: set date directly to argument values.
-U UTC-offset
Perform lunar and solar calculations from this UTC offset. If
neither UTC offset nor longitude is specified, the calculations
will be based on the difference between UTC time and localtime.
If both are specified, UTC offset overrides longitude.
-W num Print lines from today and the next num days (forward, future).
Ignore weekends when calculating the number of days.
FILE FORMAT
To handle calendars in your national code table you can specify
"LANG=<locale_name>" in the calendar file as early as possible.
To handle the local name of sequences, you can specify them as:
"SEQUENCE=<first> <second> <third> <fourth> <fifth> <last>" in the
calendar file as early as possible.
The names of the following special days are recognized:
Easter Catholic Easter.
Paskha Orthodox Easter.
NewMoon The lunar New Moon.
FullMoon The lunar Full Moon.
MarEquinox The solar equinox in March.
JunSolstice The solar solstice in June.
SepEquinox The solar equinox in September.
DecSolstice The solar solstice in December.
ChineseNewYear The first day of the Chinese year.
These names may be reassigned to their local names via an assignment like
"Easter=Pasen" in the calendar file.
Other lines should begin with a month and day. They may be entered in
almost any format, either numeric or as character strings. If the proper
locale is set, national month and weekday names can be used. A single
asterisk (``*'') matches every month. A day without a month matches that
day of every week. A month without a day matches the first of that
month. Two numbers default to the month followed by the day. Lines with
leading tabs default to the last entered date, allowing multiple line
specifications for a single date.
The names of the recognized special days may be followed by a positive or
negative integer, like: "Easter+3" or "Paskha-4".
Weekdays may be followed by ``-4'' ... ``+5'' (aliases for last, first,
second, third, fourth) for moving events like ``the last Monday in
April''.
By convention, dates followed by an asterisk are not fixed, i.e., change
from year to year.
Day descriptions start after the first <tab> character in the line; if
the line does not contain a <tab> character, it is not displayed. If the
first character in the line is a <tab> character, it is treated as a
continuation of the previous line.
The calendar file is preprocessed by a limited subset of cpp(1)
internally, allowing the inclusion of shared files such as lists of
company holidays or meetings. This limited subset consists of #include,
#define, #undef, #ifdef, #ifndef, #else, #warning, and #error.
Conditions can be nested and the consistency of opening and closing
instructions is checked. Only the first word after #define is used as
the name of the condition variable being defined. More than word
following #ifdef, #ifndef, or #undef is considered a syntax error, since
names cannot include white-space. Included files are parsed in a global
scope with regard to the condition variables being defined or tested
therein. All conditional blocks are implicitly closed at the end of a
file, and missing #endif instructions are assumed to be present on
implied succeeding lines.
If the shared file is not referenced by a full pathname, calendar
searches in the current (or home) directory first, and then in the
directory /usr/share/calendar. Empty lines and text protected by the C
commenting syntax (/* ... */) or (//) are ignored.
Some possible calendar entries (<tab> characters highlighted by \t
sequence):
LANG=C
Easter=Ostern
#include <calendar.usholiday>
#include <calendar.birthday>
6/15\tJune 15 (if ambiguous, will default to month/day).
Jun. 15\tJune 15.
15 June\tJune 15.
Thursday\tEvery Thursday.
June\tEvery June 1st.
15 *\t15th of every month.
2010/4/15\t15 April 2010
May Sun+2\tsecond Sunday in May (Muttertag)
04/SunLast\tlast Sunday in April,
\tsummer time in Europe
Easter\tEaster
Ostern-2\tGood Friday (2 days before Easter)
Paskha\tOrthodox Easter
FILES
calendar file in current directory.
~/.calendar calendar HOME directory. A chdir is done into this
directory if it exists.
~/.calendar/calendar
calendar file to use if no calendar file exists in
the current directory.
~/.calendar/nomail do not send mail if this file exists.
/usr/share/calendar
system wide location of calendar files provided as
part of the base system.
/usr/local/share/calendar
system wide location for calendar files provided by a
port or package.
The order of precedence in searches for a calendar file is: current
directory, ~/.calendar, /usr/local/share/calendar, /usr/share/calendar.
Files of similar names are ignored in lower precedence locations.
The following default calendar files are provided by the
deskutils/calendar-data port.
calendar.all File which includes all the default files.
calendar.australia Calendar of events in Australia.
calendar.birthday Births and deaths of famous (and not-so-famous)
people.
calendar.christian Christian holidays. This calendar should be
updated yearly by the local system administrator so
that roving holidays are set correctly for the
current year.
calendar.computer Days of special significance to computer people.
calendar.croatian Calendar of events in Croatia.
calendar.dutch Calendar of events in the Netherlands.
calendar.freebsd Birthdays of FreeBSD committers.
calendar.french Calendar of events in France.
calendar.german Calendar of events in Germany.
calendar.history Everything else, mostly U.S. historical events.
calendar.holiday Other holidays, including the not-well-known,
obscure, and really obscure.
calendar.judaic Jewish holidays. The entries for this calendar
have been obtained from the deskutils/hebcal port.
calendar.music Musical events, births, and deaths. Strongly
oriented toward rock 'n' roll.
calendar.newzealand Calendar of events in New Zealand.
calendar.russian Russian calendar.
calendar.southafrica Calendar of events in South Africa.
calendar.usholiday U.S. holidays. This calendar should be updated
yearly by the local system administrator so that
roving holidays are set correctly for the current
year.
calendar.world Includes all calendar files except for national
files.
COMPATIBILITY
The calendar program previously selected lines which had the correct date
anywhere in the line. This is no longer true, the date is only
recognized when it occurs at the beginning of a line.
SEE ALSO
at(1), mail(1), cron(8)
HISTORY
A calendar command appeared in Version 7 AT&T UNIX.
NOTES
Chinese New Year is calculated at 120 degrees east of Greenwich, which
roughly corresponds with the east coast of China. For people west of
China, this might result that the start of Chinese New Year and the day
of the related new moon might differ.
The phases of the moon and the longitude of the sun are calculated
against the local position which corresponds with 30 degrees times the
time-difference towards Greenwich.
The new and full moons are happening on the day indicated: They might
happen in the time period in the early night or in the late evening. It
does not indicate that they are starting in the night on that date.
Because of minor differences between the output of the formulas used and
other sources on the Internet, Druids and Werewolves should double-check
the start and end time of solar and lunar events.
BUGS
The calendar does only recognise the cpp directives #include, #define,
#ifdef, #ifndef and #else. It supports nested conditions, but does not
perform any validation on the correct use and nesting of conditions.
#endif without prior #ifdef or #define is ignored and #else outside a
conditional section skips input lines up to the next #endif.
There is no possibility to properly specify the local position needed for
solar and lunar calculations.
FreeBSD 13.1-RELEASE-p6 November 5, 2020 FreeBSD 13.1-RELEASE-p6
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