AFAIK you can use the tzinfo-data gem. Someone needs to manually update it though. So far it looks like it is still on the previous 2015g and not on 2016a that just got released: <a href="https:&#x2F;&#x2F;github.com&#x2F;tzinfo&#x2F;tzinfo-data" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;tzinfo&#x2F;tzinfo-data</a>