I Have been looking at the forums trying to find a solution, managed to change it on the server itself under:
/etc/graylog/server/server.conf , but it still does not fix the issue, I need to do the following:
All current users and All future Users Time zone must be set to
Johannesburg (I’ve completed most already manually).
Change Default Time zone to Display Johannesburg, for new users.
I would like that field to be fixed to the default(Johannesburg) if possible.
when you create the user, you can select the timezone of the user(That is what they been doing)