I looked into it further and the firewall is sending the year in the message, I thought that it wasn't but it was getting chopped off in the json output.
I rectified it by using ${MSGHDR}${MSG} in my template which now gives me the full timestamp in the message which is mainly what I needed. 

I will look into the date-parser thanks for the info. 

On Sun, Jun 18, 2017 at 7:14 AM, Fabien Wernli <wernli@in2p3.fr> wrote:
Hi Andrew,

If you have a recent enough syslog-ng version, you can use the date-parser
to parse your date. Otherwise, I guess you could use the current year $YEAR
and add it to the message using a rewrite rule.

Cheers

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