cal(1)cal(1)NAMEcal - Displays a calendar
SYNOPSIScal [month [year]]
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
Names the month for which you want the calendar. It can be a number
between 1 and 12 for January through December, respectively. If month
is not specified, cal displays a calendar for the entire year, unless
year is also omitted. Names the year for which you want the calendar.
Because cal can display a calendar for any year from 1 to 9999, enter
the full year rather than just the last two digits. If year is not
specified, cal uses the current year.
If no operands are specified, cal displays a calendar for the current
The cal command writes to standard output a Gregorian calendar for the
specified year or month.
For historical reasons, the cal command's Gregorian calendar is discon‐
tinuous. The display for September 1752 (cal 9 1752) jumps from Wednes‐
day the 2nd to Thursday the 14th.
The cal command checks the LC_TIME environment variable and uses the
correct headers for the current locale. If LC_TIME is not set, cal
checks the value of LANG. If neither variable is set, you receive Eng‐
The following exit values are returned: Successful completion. An
To display a calendar for February 1990, enter: cal 2 1990 To display a
calendar for the year 84 A.D., enter: cal 84 To display a calendar for
the current month, enter: calENVIRONMENT VARIABLES
The following environment variables affect the execution of *cmd*: Pro‐
vides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from
the default locale is used. If any of the internationalization vari‐
ables contain an invalid setting, the utility behaves as if none of the
variables had been defined. If set to a non-empty string value, over‐
rides 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 multi‐
byte characters in arguments). Determines the locale for the format
and contents of diagnostic messages written to standard error. Deter‐
mines the format and contents of the calendar. Determines the location
of message catalogues for the processing of LC_MESSAGES. Determines
the time zone used to calculate the value of the current month.
Command and Shell User's Guide