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Full Discussion: Add a day to a given date
Top Forums UNIX for Dummies Questions & Answers Add a day to a given date Post 302209043 by pallet on Wednesday 25th of June 2008 04:13:33 PM
Old 06-25-2008
Add a day to a given date

Hi,

I have a date field which is a variable field being passed to the script from outside.
I need to know how i can add 1 day to it.

I have seen example of date subtraction but while adding each time date reaches 31 or 30 i have to put if else condition.
Or for leap year also.

Kindly let me know if there is any function in unix to add 1 day to any date field.
 

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DATE(1) 							   User Commands							   DATE(1)

NAME
date - print or set the system date and time SYNOPSIS
date [OPTION]... [+FORMAT] date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]] DESCRIPTION
Display the current time in the given FORMAT, or set the system date. -d, --date=STRING display time described by STRING, not `now' -f, --file=DATEFILE like --date once for each line of DATEFILE -ITIMESPEC, --iso-8601[=TIMESPEC] output date/time in ISO 8601 format. TIMESPEC=`date' for date only, `hours', `minutes', or `seconds' for date and time to the indi- cated precision. --iso-8601 without TIMESPEC defaults to `date'. -r, --reference=FILE display the last modification time of FILE -R, --rfc-822 output RFC-822 compliant date string -s, --set=STRING set time described by STRING -u, --utc, --universal print or set Coordinated Universal Time --help display this help and exit --version output version information and exit FORMAT controls the output. The only valid option for the second form specifies Coordinated Universal Time. Interpreted sequences are: %% a literal % %a locale's abbreviated weekday name (Sun..Sat) %A locale's full weekday name, variable length (Sunday..Saturday) %b locale's abbreviated month name (Jan..Dec) %B locale's full month name, variable length (January..December) %c locale's date and time (Sat Nov 04 12:02:33 EST 1989) %C century (year divided by 100 and truncated to an integer) [00-99] %d day of month (01..31) %D date (mm/dd/yy) %e day of month, blank padded ( 1..31) %F same as %Y-%m-%d %g the 2-digit year corresponding to the %V week number %G the 4-digit year corresponding to the %V week number %h same as %b %H hour (00..23) %I hour (01..12) %j day of year (001..366) %k hour ( 0..23) %l hour ( 1..12) %m month (01..12) %M minute (00..59) %n a newline %N nanoseconds (000000000..999999999) %p locale's upper case AM or PM indicator (blank in many locales) %P locale's lower case am or pm indicator (blank in many locales) %r time, 12-hour (hh:mm:ss [AP]M) %R time, 24-hour (hh:mm) %s seconds since `00:00:00 1970-01-01 UTC' (a GNU extension) %S second (00..60); the 60 is necessary to accommodate a leap second %t a horizontal tab %T time, 24-hour (hh:mm:ss) %u day of week (1..7); 1 represents Monday %U week number of year with Sunday as first day of week (00..53) %V week number of year with Monday as first day of week (01..53) %w day of week (0..6); 0 represents Sunday %W week number of year with Monday as first day of week (00..53) %x locale's date representation (mm/dd/yy) %X locale's time representation (%H:%M:%S) %y last two digits of year (00..99) %Y year (1970...) %z RFC-822 style numeric timezone (-0500) (a nonstandard extension) %Z time zone (e.g., EDT), or nothing if no time zone is determinable By default, date pads numeric fields with zeroes. GNU date recognizes the following modifiers between `%' and a numeric directive. `-' (hyphen) do not pad the field `_' (underscore) pad the field with spaces ENVIRONMENT
TZ Specifies the timezone, unless overridden by command line parameters. If neither is specified, the setting from /etc/localtime is used. AUTHOR
Written by David MacKenzie. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for date is maintained as a Texinfo manual. If the info and date programs are properly installed at your site, the command info date should give you access to the complete manual. date (coreutils) 4.5.3 October 2002 DATE(1)
All times are GMT -4. The time now is 02:48 PM.
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