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Get current day on Julian date format

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# 1  
Old 01-18-2011
Get current day on Julian date format
Hi guys,

I know if I try to get a julian date using a specific date I can but I try to get the current date I got an error as you can see below:

This one works fine:
Code:
date -d "2010/10/30" +%j

But I can't get the current date as below:
Code:
`date -d "+%Y/%m/%d`" +%j

Does somebody can help me please??

Edu
# 2  
Old 01-18-2011
Tools may be simpler
why not
Code:
date +%j

This User Gave Thanks to joeyg For This Post:
edudiogo
# 3  
Old 01-18-2011
Code:
`date -d "+%Y/%m/%d`" +%j

There are syntax errors in this

try
Code:
a=`date -d "+%Y/%m/%d" +%j`
# or
a=$(date -d "+%Y/%m/%d" +%j )
echo $a

This User Gave Thanks to jim mcnamara For This Post:
edudiogo
# 4  
Old 01-18-2011
It works fine, thx..

Now I have to pass a dynamic day as parameter for example below:

`date +%y``date -d +%m/$my_day_variable/%Y` +%j`

How it can works having a dynamic day variable, also my result shoud be like this:

11018 or yyddd

I really appreciate your help my friend.

Thanks...
# 5  
Old 01-18-2011
How about:

Code:
$ my_day_var=21
$ date -d $(date +%b-$my_day_var-%Y) +%y%j
11021

Last edited by Chubler_XL; 01-18-2011 at 11:14 PM..
# 6  
Old 01-20-2011
Julian date now on UNIX AIX
My friend, I was testing the command to get the julian date on Linux, when I tested the commands on UNIX AIX as below I got the messages error:

Code:
plan_day_ori="${day}/${mon}/${year}"
date -d "$plan_day_ori" +%y%j

date: illegal option -- d
Usage: date [-u] [+Field Descriptors]

Does anybody knows if there is any difference with that command on AIX and How I can have the same result on the AIX?

Thanks
# 7  
Old 01-20-2011
Yes -d and --date parameters are not supported in the AIX version of date.

You could try some of the solutions presented in the FAQ: https://www.unix.com/answers-frequently-asked-questions/13785-yesterdays-date-date-arithmetic.html
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