1DATEADD(1)                       User Commands                      DATEADD(1)
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NAME

6       dateadd - Add DURATION to DATE/TIME and print the result.
7

SYNOPSIS

9       dateadd [OPTION]...  [DATE/TIME] [DURATION]
10

DESCRIPTION

12       Add  DURATION to DATE/TIME and print the result.  If DATE/TIME is omit‐
13       ted but DURATION is given, read a list of DATE/TIMEs  from  stdin.   If
14       DURATION  is  omitted  but DATE/TIME is given, read a list of DURATIONs
15       from stdin.
16
17       Durations are specified as nY, nMO, nW, or nD for years, months, weeks,
18       or  days  respectively,  or nH, nM, nS for hours, minutes, and seconds,
19       where N is a (possibly negative) number.  The unit symbols can be writ‐
20       ten  lower-case  as well (y, mo, w, d, h, m, s) and the unit symbol `d'
21       can be omitted.
22
23       Note that duration addition is not commutative!
24         2000-03-30 +1mo +1d -> 2000-05-01
25         2000-03-30 +1d +1mo -> 2000-04-30
26
27
28       Recognized OPTIONs:
29
30       -h, --help
31              Print help and exit
32
33       -V, --version
34              Print version and exit
35
36       -q, --quiet
37              Suppress message about date/time and duration parser errors  and
38              fix-ups.   The  default  is  to  print a warning or the fixed up
39              value and return error code 2.
40
41       -f, --format=STRING
42              Output format.  This can either be a specifier  string  (similar
43              to strftime()'s FMT) or the name of a calendar.
44
45       -i, --input-format=STRING...
46              Input  format,  can be used multiple times.  Each date/time will
47              be passed to the input format parsers  in  the  order  they  are
48              given,  if  a  date/time  can  be read successfully with a given
49              input format specifier string, that value will be used.
50
51       -b, --base=DT
52              For underspecified input use DT as a fallback to fill in missing
53              fields.   Also  used for ambiguous format specifiers to position
54              their range on the absolute time line.  Must be a  date/time  in
55              ISO8601 format.  If omitted defaults to the current date/time.
56
57       -e, --backslash-escapes
58              Enable  interpretation  of  backslash  escapes in the output and
59              input format specifier strings.
60
61       -S, --sed-mode
62              Copy parts from the input before and after a matching date/time.
63              Note  that  all  occurrences of date/times within a line will be
64              processed.
65
66       --locale=LOCALE
67              Format results according to LOCALE, this would only affect month
68              and weekday names.
69
70       --from-locale=LOCALE
71              Interpret  dates on stdin or the command line as coming from the
72              locale LOCALE, this would only affect month and weekday names as
73              input formats have to be specified explicitly.
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75       --from-zone=ZONE
76              Interpret  dates on stdin or the command line as coming from the
77              time zone ZONE.
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79       -z, --zone=ZONE
80              Convert dates printed on stdout to time zone ZONE, default: UTC.
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FORMAT SPECS

83       Format specs in dateutils are similar to posix' strftime().
84
85       However, due to a broader range of supported calendars  dateutils  must
86       employ different rules.
87
88       Date specs:
89         %a  The abbreviated weekday name
90         %A  The full weekday name
91         %_a The weekday name shortened to a single character (MTWRFAS)
92         %b  The abbreviated month name
93         %B  The full month name
94         %_b The month name shortened to a single character (FGHJKMNQUVXZ)
95         %c  The count of the weekday within the month (range 00 to 05)
96         %C  The count of the weekday within the year (range 00 to 53)
97         %d  The day of the month, 2 digits (range 00 to 31)
98         %D  The day of the year, 3 digits (range 000 to 366)
99         %F  Equivalent to %Y-%m-%d (ymd's canonical format)
100         %g  ISO week date year without the century (range 00 to 99)
101         %G  ISO week date year including the century
102         %j  Equivalent to %D
103         %m  The month in the current calendar (range 00 to 19)
104         %Q  The quarter of the year (range Q1 to Q4)
105         %q  The number of the quarter (range 01 to 04)
106         %s  The number of seconds since the Epoch.
107         %u  The weekday as number (range 01 to 07, Sunday being 07)
108         %U  The week count,  day of week is Sun (range 00 to 53)
109         %V  The ISO week count,  day of week is Mon (range 01 to 53)
110         %w  The weekday as number (range 00 to 06, Sunday being 00)
111         %W  The week count,  day of week is Mon (range 00 to 53)
112         %y  The year without a century (range 00 to 99)
113         %Y  The year including the century
114         %_y The year shortened to a single digit
115         %Z  The zone offset in hours and minutes (HH:MM) with
116             a preceding sign (+ for offsets east of UTC, - for offsets
117             west of UTC)
118
119         %Od The day as roman numerals
120         %Om The month as roman numerals
121         %Oy The two digit year as roman numerals
122         %OY The year including the century as roman numerals
123
124         %rs In time systems whose Epoch is different from the unix Epoch, this
125             selects the number of seconds since then.
126         %rY In calendars with years that don't coincide with the Gregorian
127             years, this selects the calendar's year.
128
129         %dth  The day of the month as an ordinal number, 1st, 2nd, 3rd, etc.
130         %mth  The month of the year as an ordinal number, 1st, 2nd, 3rd, etc.
131
132         %db The business day of the month (since last month's ultimo)
133         %dB Number of business days until this month's ultimo
134
135       Time specs:
136         %H  The hour of the day using a 24h clock, 2 digits (range 00 to 23)
137         %I  The hour of the day using a 12h clock, 2 digits (range 01 to 12)
138         %M  The minute (range 00 to 59)
139         %N  The nanoseconds (range 000000000 to 999999999)
140         %p  The string AM or PM, noon is PM and midnight is AM.
141         %P  Like %p but in lowercase
142         %S  The  (range 00 to 60, 60 is for leap seconds)
143         %T  Equivalent to %H:%M:%S
144
145       General specs:
146         %n  A newline character
147         %t  A tab character
148         %%  A literal % character
149
150       Modifiers:
151         %O  Modifier to turn decimal numbers into Roman numerals
152         %r  Modifier to turn units into real units
153         %0  Modifier to turn on zero prefixes
154         %SPC  Modifier to turn on space prefixes
155         %-  Modifier to turn off prefixes altogether
156         th  Suffix, read and print ordinal numbers
157         b   Suffix, treat days as business days
158
159       By design dates before 1601-01-01 are not supported.
160
161       For  conformity here is a list of calendar designators and their corre‐
162       sponding format string:
163         ymd     %Y-%m-%d
164         ymcw    %Y-%m-%c-%w
165         ywd     %rY-W%V-%u
166         bizda   %Y-%m-%db
167         lilian     n/a
168         ldn        n/a
169         julian     n/a
170         jdn        n/a
171         matlab     n/a
172         mdn        n/a
173
174       These designators can  be  used  as  output  format  string,  moreover,
175       @code{lilian}/@code{ldn}  and @code{julian}/@code{jdn} can also be used
176       as input format string.
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178

SPECIFYING DURATIONS

180       Some tools ("dateadd", "dateseq") need durations as their input.  Dura‐
181       tions  are  generally  incompatible  with input formats as specified by
182       "-i|--input-format" and (at the moment) the input syntax is fixed.
183
184       The general format is "+-Nunit" where "+" or "-" is  the  sign,  "N"  a
185       number, and "unit" the unit as discussed below.
186
187       Units:
188         s  seconds
189         m  minutes
190         h  hours
191         rs real-life seconds, as in including leap  transitions
192
193         d  days
194         b  business days
195         mo months
196         y  years
197
198       For  historical  reasons, we used to accept "m" in the context of date-
199       only input as a qualifier for months.  As of 0.4.4, this is  no  longer
200       the case.
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202

EXAMPLES

204         $ dateadd 2012-03-01 1d
205         2012-03-02
206         $
207
208         $ dateadd 2012-03-01 1mo
209         2012-04-01
210         $
211
212         $ dateadd 2012-03-31 1mo
213         2012-04-30
214         $
215
216         $ dateadd 2w2d <<EOF
217         2012-03-01
218         2012-03-02
219         2012-03-04
220         2012-03-08
221         2012-03-16
222         EOF
223         2012-03-17
224         2012-03-18
225         2012-03-20
226         2012-03-24
227         2012-04-01
228         $
229
230         $ dateadd 10:01:00 1h6m
231         11:07:00
232         $
233
234         $ dateadd 10:01:00 -1h6m
235         08:55:00
236         $
237
238         $ dateadd 10:01:00 3605s
239         11:01:05
240         $
241

AUTHOR

243       Written by Sebastian Freundt <freundt@fresse.org>
244

REPORTING BUGS

246       Report bugs to: https://github.com/hroptatyr/dateutils/issues
247

SEE ALSO

249       The  full  documentation for dateadd is maintained as a Texinfo manual.
250       If the info and dateadd programs are properly installed at  your  site,
251       the command
252
253              info (dateutils)dateadd
254
255       should give you access to the complete manual.
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259dateutils 0.4.5                 September 2018                      DATEADD(1)
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