[CentOS] Timezone and date

Wed Apr 5 01:22:51 UTC 2017
Jerry Geis <jerry.geis at gmail.com>

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid
timezone. I have no way to modify the other system.

My question is - is there a way to get the non-day-lite savings time zone ?
For example EST is valid - EDT is not.

Just curious if there is an easy way already present to get a standard time

Thanks, - I know weird situation the other end not supported EDT.