csv file field needs to be changed current system date with awk

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# 1  
Old 08-18-2011
csv file field needs to be changed current system date with awk


I have csv file with records as shown below.

HTML Code:
4102,Bangalore,G10,21,08/17/2011 09:28:33:188,99,08/17/2011 09:27:33:881,08/17/2011 09:27:39:22,1580807561,404450302456086,919740330452,3553100467504101,2,NULL,NULL,Ericsson-South_Central,,airtelgprs.com,404,45,16274,255,443,,,443,881,67,3522,2210,11,12,1,1,870,2284,5141,0,443,1,5,1580807561,NULL,NULL,NULL,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,27043,NULL,
here fifth $5 field is some date and time say 08/17/2011 09:28:33:188

i want to change that field with current system date and time for all the records.ate time is
say current system date 08/18/2011 15:14:57:188

any thought with awk ?

# 2  
Old 08-18-2011
awk -v dat=$(date +%d/%m/%Y) -v tim=$(date +%H:%M:%S) '{$5=dat" "tim}1' FS=, file

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