Easysocial timezone is UTC regardless server setting

I have the same issue as the following post.
http://stackideas.com/forums/how-to-set-creation-publishing-time-to-my-time-zone

I noticed when I created a dummy event via a group. ( see attached )

My questions are
<blockquote>I have set "London" via Global Configration> server > Server time zone, which is not applied to easysocial event timezone. How can I fix it? If you can apply the fix directly to my site, does it mean that I need to request you again every time I upgrade the latest version of ES in the future?
</blockquote>
<blockquote>
I didn't see the same timezone field for event when I created it. Does it mean that timezone is set to London for this?
http://88.150.140.238/~a00000dr/dev/2016-05-20-00-11-35/all-events/steps/1
</blockquote>
<blockquote>
Are there any other places that timezone field appear in easysocial except group > event?
</blockquote>

Many thanks

HS