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PROGRAM:

NAME


dtest - Like test(1) but for dates.

SYNOPSIS


dtest [OPTION]... DATE/TIME1 OP DATE/TIME2

DESCRIPTION


Like test(1) but for dates.

Recognized OPTIONs:

-h, --help
Print help and exit

-V, --version
Print version and exit

-q, --quiet
Suppress message about date/time and duration parser errors.

-i, --input-format=STRING...
Input format, can be used multiple times. Each date/time will be passed to the
input format parsers in the order they are given, if a date/time can be read
successfully with a given input format specifier string, that value will be used.

-e, --backslash-escapes
Enable interpretation of backslash escapes in the output and input format specifier
strings.

--eq DATE/TIME1 is the same as DATE/TIME2

--ne DATE/TIME1 is not the same as DATE/TIME2

--gt DATE/TIME1 is newer than DATE/TIME2

--lt DATE/TIME1 is older than DATE/TIME2

--ge DATE/TIME1 is newer than or equals DATE/TIME2

--le DATE/TIME1 is older than or equals DATE/TIME2

--nt DATE/TIME1 is newer than DATE/TIME2

--ot DATE/TIME1 is older than DATE/TIME2

--cmp compare DATE/TIME1 to DATE/TIME2, return with 0 if equal, 1 if left argument was
newer and 2 if right argument was newer

FORMAT SPECS


Format specs in dateutils are similar to posix' strftime().

However, due to a broader range of supported calendars dateutils must employ different
rules.

Date specs:
%a The abbreviated weekday name
%A The full weekday name
%_a The weekday name shortened to a single character (MTWRFAS)
%b The abbreviated month name
%B The full month name
%_b The month name shortened to a single character (FGHJKMNQUVXZ)
%c The count of the weekday within the month (range 00 to 05)
%C The count of the weekday within the year (range 00 to 53)
%d The day of the month, 2 digits (range 00 to 31)
%D The day of the year, 3 digits (range 000 to 366)
%F Equivalent to %Y-%m-%d (ymd's canonical format)
%j Equivalent to %D
%m The month in the current calendar (range 00 to 19)
%Q The quarter of the year (range Q1 to Q4)
%q The number of the quarter (range 01 to 04)
%s The number of seconds since the Epoch.
%u The weekday as number (range 01 to 07, Sunday being 07)
%U The week count, day of week is Sun (range 00 to 53)
%V The ISO week count, day of week is Mon (range 01 to 53)
%w The weekday as number (range 00 to 06, Sunday being 00)
%W The week count, day of week is Mon (range 00 to 53)
%y The year without a century (range 00 to 99)
%Y The year including the century
%Z The zone offset in hours and minutes (HH:MM) with
a preceding sign (+ for offsets east of UTC, - for offsets
west of UTC)

%Od The day as roman numerals
%Om The month as roman numerals
%Oy The two digit year as roman numerals
%OY The year including the century as roman numerals

%rs In time systems whose Epoch is different from the unix Epoch, this
selects the number of seconds since then.
%rY In calendars with years that don't coincide with the Gregorian
years, this selects the calendar's year.

%dth The day of the month as an ordinal number, 1st, 2nd, 3rd, etc.
%mth The month of the year as an ordinal number, 1st, 2nd, 3rd, etc.

%db The business day of the month (since last month's ultimo)
%dB Number of business days until this month's ultimo

Time specs:
%H The hour of the day using a 24h clock, 2 digits (range 00 to 23)
%I The hour of the day using a 12h clock, 2 digits (range 01 to 12)
%M The minute (range 00 to 59)
%N The nanoseconds (range 000000000 to 999999999)
%p The string AM or PM, noon is PM and midnight is AM.
%P Like %p but in lowercase
%S The (range 00 to 60, 60 is for leap seconds)
%T Equivalent to %H:%M:%S

General specs:
%n A newline character
%t A tab character
%% A literal % character

Modifiers:
%O Modifier to turn decimal numbers into Roman numerals
%r Modifier to turn units into real units
th Suffix, read and print ordinal numbers
b Suffix, treat days as business days

By design dates before 1601-01-01 are not supported.

For conformity here is a list of calendar designators and their corresponding format
string:
ymd %Y-%m-%d
ymcw %Y-%m-%c-%w
ywd %rY-W%V-%u
bizda %Y-%m-%db
lilian n/a
ldn n/a
julian n/a
jdn n/a

These designators can be used as output format string, moreover, @code{lilian}/@code{ldn}
and @code{julian}/@code{jdn} can also be used as input format string.

EXAMPLES


$ dtest 2012-03-01 --gt 2012-03-02 || echo "false"
false
$

$ dtest 2012-03-01 --ot 2012-03-02 && echo "true"
true
$

$ dtest 2012-03-01 --cmp 2012-03-02; echo $?
2
$

$ dtest 2012-03-02 --cmp 2012-03-02; echo $?
0
$

$ dtest 2012-03-02 --cmp 2012-03-01; echo $?
1
$

$ dtest 12:00:04 --gt 11:22:33 && echo "true"
true
$

$ dtest 12:00:04 --lt 11:22:33 || echo "false"
false
$

$ dtest 12:00:04 --cmp 11:22:33; echo "$@{?@}"
1
$

$ dtest --cmp 11:22:33 12:00:04; echo "$@{?@}"
2
$

$ dtest --ne 2012-03-02T00:00:00 2012-03-02 || echo 'false'
false
$

$ dtest 2012-03-02T09:00:00 --ot 2012-03-02T10:00:00 && echo "true"
true
$

$ dtest 2012-03-02T07:00:00 --cmp 2012-03-02T09:30:00; echo "$@{?@}"
2
$

$ dtest --cmp 2012-03-02T12:00:00 2012-03-02T09:30:00; echo "$@{?@}"
1
$

$ dtest 2012-03-02T07:00:00 --cmp 09:30:00; echo "$@{?@}"
3
$

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