Process and filter log files by date using AWK

Unix AWK doesn't have strptime function, which makes life a little messy.
An example to calculate the Epoch time is as fallows but it is a little ugly too.
works for me as a quick way to get things done.

cat /var/log/yum.log | awk 'BEGIN { mnts="JANFEBMARAPRJUNJULAUGSEPOCTNOVDEC"; ST=mktime("2015 11 18 11 32 00"); EN=mktime("2015 12 18 11 33 00");}{ MON=$1; DAY=$2 ; split($3,TM,":"); M=((index(mnts,toupper(MON)))+2)/3+1; EPOCH=mktime("2015 "M" "DAY" "TM[1]" "TM[2]" "TM[3]); if ((ST < EPOCH)&&(EN > EPOCH)) { print $0; }}'

Running jobs in different Timezones and Day light saving or DST by crontab

Oh, This day light saving thing. Why people don't set their whole environment clock on UTC ?
Believe me, I all will have better life if that happens.

Any way, The newer versions of crontab have introduced a good way to run job in different time zones. Just look at the following example of crontab file for instance.

#######################IMPORTANT#######################

# Anything beyond this line will run in Australia/Victoria time zone

#######################################################

CRON_TZ=Australia/Victoria

#######################################################

00 08 * * * /home/healthcheck/linux/send-email.sh

#######################IMPORTANT#######################

# Anything beyond this line will run in America/New_York time zone

#######################################################

CRON_TZ=America/New_York  

#######################################################

00 08 * * * /home/healthcheck/linux/syslog-check.sh

#######################IMPORTANT#######################

# Anything beyond this line will run in UTC time zone

#######################################################

CRON_TZ=UTC

#######################################################

01 16 * * * /home/healthcheck/linux/runDST.sh

And to check when this year's day light saving happens ?

[healthcheck@adm01 ~]$  zdump -v Australia/Victoria| grep `date +%Y`
Australia/Victoria  Sat Apr  6 15:59:59 2013 UTC = Sun Apr  7 02:59:59 2013 EST isdst=1 gmtoff=39600
Australia/Victoria  Sat Apr  6 16:00:00 2013 UTC = Sun Apr  7 02:00:00 2013 EST isdst=0 gmtoff=36000
Australia/Victoria  Sat Oct  5 15:59:59 2013 UTC = Sun Oct  6 01:59:59 2013 EST isdst=0 gmtoff=36000
Australia/Victoria  Sat Oct  5 16:00:00 2013 UTC = Sun Oct  6 03:00:00 2013 EST isdst=1 gmtoff=39600
[healthcheck@adm01 ~]$