79 lines
2.1 KiB
Groff
79 lines
2.1 KiB
Groff
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.TH DATE 1
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.SH NAME
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date \- print or set the date and time
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.SH SYNOPSIS
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\fBdate [\fB\-qsuS\fR] [\fB\-r\fI seconds\fR]
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[[\fIMMDDYY\fR]\fIhhmm\fR[\fIss\fR]] [\fI+format\fR]\fR
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.br
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.de FL
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.TP
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\\fB\\$1\\fR
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\\$2
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..
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.de EX
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.TP 20
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\\fB\\$1\\fR
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# \\$2
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..
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.SH OPTIONS
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.FL "\-q" "Read the date from \fIstdin\fR"
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.FL "\-s" "Set the time (implicit for \fB\-q\fR or a date string)"
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.FL "\-u" "Print the date as GMT"
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.FL "\-S" "Date within Eternal September"
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.FL "\-r" "Use this number of seconds instead of current time"
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.SH EXAMPLES
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.EX "date" "Print the date and time"
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.EX "date 0221921610" "Set date to Feb 21, 1992 at 4:10 p.m."
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.SH DESCRIPTION
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.PP
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With the \fB\-q\fR flag or a numeric argument,
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.I date
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sets the GMT time and date.
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.I MMDDYY
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refers to the month, day, and year;
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.I hhmmss
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refers to the hour, minute and second.
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Each of the six fields must be exactly two digits, no more and no less.
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.I date
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always display the date and time, with the default format for the system.
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The \fB\-u\fR flag request GMT time instead of local time.
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A format may be specified with a + followed by a printf-like string with
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the following options:
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.ta 0.25i
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.nf
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.PP
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%% % character
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%A Name of the day
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%B Name of the month
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%D mm/dd/yy
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%H Decimal hour on 2 digits
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%I Decimal hour modulo 12 on 2 digits
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%M Decimal minute on 2 digits
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%S Decimal seconds on 2 digits
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%T HH:MM:SS
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%U Decimal week number, Sunday being first day of week
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%W Decimal week number, Monday being first day of week
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%X Same as %T
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%Y Decimal year on 4 digits
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%Z Time Zone (if any)
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%a Abbreviated name of the day
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%b Abbreviated name of the month
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%c Appropriate date & time (default format)
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%d Decimal day of the month on 2 digits
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%e Same as %d, but a space replaces leading 0
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%h Same as %b
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%j Decimal dey of the year on 3 digits
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%m Decimal month on 2 digits
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%n Newline character
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%p AM or PM
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%r 12-hour clock time with AM/PM
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%s Number of seconds since the epoch
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%t Tab character
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%w Decimal day of the week (0=Sunday)
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%x Same as %D
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%y Decimal year on 2 digits
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.SH "SEE ALSO"
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.BR time (2),
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.BR ctime (3),
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.BR readclock (8).
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