1DATETEST(1) User Commands DATETEST(1)
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6 datetest - Like test(1) but for dates.
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9 datetest [OPTION]... DATE/TIME1 OP DATE/TIME2
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12 Like test(1) but for dates.
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15 Recognized OPTIONs:
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17 -h, --help
18 Print help and exit
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20 -V, --version
21 Print version and exit
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23 -q, --quiet
24 Suppress message about date/time and duration parser errors.
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26 -i, --input-format=STRING...
27 Input format, can be used multiple times. Each date/time will
28 be passed to the input format parsers in the order they are
29 given, if a date/time can be read successfully with a given
30 input format specifier string, that value will be used.
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32 -b, --base=DT
33 For underspecified input use DT as a fallback to fill in missing
34 fields. Also used for ambiguous format specifiers to position
35 their range on the absolute time line. Must be a date/time in
36 ISO8601 format. If omitted defaults to the current date/time.
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38 --from-locale=LOCALE
39 Interpret dates on stdin or the command line as coming from the
40 locale LOCALE, this would only affect month and weekday names as
41 input formats have to be specified explicitly.
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43 --from-zone=ZONE
44 Interpret dates on stdin or the command line as coming from the
45 time zone ZONE.
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47 -e, --backslash-escapes
48 Enable interpretation of backslash escapes in the output and
49 input format specifier strings.
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51 --eq DATE/TIME1 is the same as DATE/TIME2
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53 --ne DATE/TIME1 is not the same as DATE/TIME2
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55 --gt DATE/TIME1 is newer than DATE/TIME2
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57 --lt DATE/TIME1 is older than DATE/TIME2
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59 --ge DATE/TIME1 is newer than or equals DATE/TIME2
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61 --le DATE/TIME1 is older than or equals DATE/TIME2
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63 --nt DATE/TIME1 is newer than DATE/TIME2
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65 --ot DATE/TIME1 is older than DATE/TIME2
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67 --cmp compare DATE/TIME1 to DATE/TIME2, return with 0 if equal, 1 if
68 left argument was newer and 2 if right argument was newer
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70 --isvalid
71 Return success if dates specified conform to input format.
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74 Format specs in dateutils are similar to posix' strftime().
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76 However, due to a broader range of supported calendars dateutils must
77 employ different rules.
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79 Date specs:
80 %a The abbreviated weekday name
81 %A The full weekday name
82 %_a The weekday name shortened to a single character (MTWRFAS)
83 %b The abbreviated month name
84 %B The full month name
85 %_b The month name shortened to a single character (FGHJKMNQUVXZ)
86 %c The count of the weekday within the month (range 00 to 05)
87 %C The count of the weekday within the year (range 00 to 53)
88 %d The day of the month, 2 digits (range 00 to 31)
89 %D The day of the year, 3 digits (range 000 to 366)
90 %F Equivalent to %Y-%m-%d (ymd's canonical format)
91 %g ISO week date year without the century (range 00 to 99)
92 %G ISO week date year including the century
93 %j Equivalent to %D
94 %m The month in the current calendar (range 00 to 19)
95 %Q The quarter of the year (range Q1 to Q4)
96 %q The number of the quarter (range 01 to 04)
97 %s The number of seconds since the Epoch.
98 %u The weekday as number (range 01 to 07, Sunday being 07)
99 %U The week count, day of week is Sun (range 00 to 53)
100 %V The ISO week count, day of week is Mon (range 01 to 53)
101 %w The weekday as number (range 00 to 06, Sunday being 00)
102 %W The week count, day of week is Mon (range 00 to 53)
103 %y The year without a century (range 00 to 99)
104 %Y The year including the century
105 %_y The year shortened to a single digit
106 %Z The zone offset in hours and minutes (HH:MM) with
107 a preceding sign (+ for offsets east of UTC, - for offsets
108 west of UTC)
109
110 %Od The day as roman numerals
111 %Om The month as roman numerals
112 %Oy The two digit year as roman numerals
113 %OY The year including the century as roman numerals
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115 %rs In time systems whose Epoch is different from the unix Epoch, this
116 selects the number of seconds since then.
117 %rY In calendars with years that don't coincide with the Gregorian
118 years, this selects the calendar's year.
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120 %dth The day of the month as an ordinal number, 1st, 2nd, 3rd, etc.
121 %mth The month of the year as an ordinal number, 1st, 2nd, 3rd, etc.
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123 %db The business day of the month (since last month's ultimo)
124 %dB Number of business days until this month's ultimo
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126 Time specs:
127 %H The hour of the day using a 24h clock, 2 digits (range 00 to 23)
128 %I The hour of the day using a 12h clock, 2 digits (range 01 to 12)
129 %M The minute (range 00 to 59)
130 %N The nanoseconds (range 000000000 to 999999999)
131 %p The string AM or PM, noon is PM and midnight is AM.
132 %P Like %p but in lowercase
133 %S The (range 00 to 60, 60 is for leap seconds)
134 %T Equivalent to %H:%M:%S
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136 General specs:
137 %n A newline character
138 %t A tab character
139 %% A literal % character
140
141 Modifiers:
142 %O Modifier to turn decimal numbers into Roman numerals
143 %r Modifier to turn units into real units
144 %0 Modifier to turn on zero prefixes
145 %SPC Modifier to turn on space prefixes
146 %- Modifier to turn off prefixes altogether
147 th Suffix, read and print ordinal numbers
148 b Suffix, treat days as business days
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150 By design dates before 1601-01-01 are not supported.
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152 For conformity here is a list of calendar designators and their correā
153 sponding format string:
154 ymd %Y-%m-%d
155 ymcw %Y-%m-%c-%w
156 ywd %rY-W%V-%u
157 bizda %Y-%m-%db
158 lilian n/a
159 ldn n/a
160 julian n/a
161 jdn n/a
162 matlab n/a
163 mdn n/a
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165 These designators can be used as output format string, moreover,
166 @code{lilian}/@code{ldn} and @code{julian}/@code{jdn} can also be used
167 as input format string.
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169
171 $ datetest 2012-03-01 --gt 2012-03-02 || echo "false"
172 false
173 $
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175 $ datetest 2012-03-01 --ot 2012-03-02 && echo "true"
176 true
177 $
178
179 $ datetest 2012-03-01 --cmp 2012-03-02; echo $?
180 2
181 $
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183 $ datetest 2012-03-02 --cmp 2012-03-02; echo $?
184 0
185 $
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187 $ datetest 2012-03-02 --cmp 2012-03-01; echo $?
188 1
189 $
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191 $ datetest 12:00:04 --gt 11:22:33 && echo "true"
192 true
193 $
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195 $ datetest 12:00:04 --lt 11:22:33 || echo "false"
196 false
197 $
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199 $ datetest 12:00:04 --cmp 11:22:33; echo "$@{?@}"
200 1
201 $
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203 $ datetest --cmp 11:22:33 12:00:04; echo "$@{?@}"
204 2
205 $
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207 $ datetest --ne 2012-03-02T00:00:00 2012-03-02 || echo 'false'
208 false
209 $
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211 $ datetest 2012-03-02T09:00:00 --ot 2012-03-02T10:00:00 && echo "true"
212 true
213 $
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215 $ datetest 2012-03-02T07:00:00 --cmp 2012-03-02T09:30:00; echo "$@{?@}"
216 2
217 $
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219 $ datetest --cmp 2012-03-02T12:00:00 2012-03-02T09:30:00; echo "$@{?@}"
220 1
221 $
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223 $ datetest 2012-03-02T07:00:00 --cmp 09:30:00; echo "$@{?@}"
224 3
225 $
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228 Written by Sebastian Freundt <freundt@fresse.org>
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231 Report bugs to: https://github.com/hroptatyr/dateutils/issues
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234 The full documentation for datetest is maintained as a Texinfo manual.
235 If the info and datetest programs are properly installed at your site,
236 the command
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238 info (dateutils)datetest
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240 should give you access to the complete manual.
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244dateutils 0.4.6 March 2019 DATETEST(1)