What steps will reproduce the problem?
1.snorby dashboard is not updating after the change of time zone
2. See: https://github.com/Snorby/snorby/issues/54
3.

What is the expected output? What do you see instead?

I know that it dose depend of you but people could write abut it 

What version of the product are you using?
(grep VERSION /etc/nsm/securityonion.conf)

ENGINE=snort
VERSION=20120116
DAYSTOKEEP=365

Please provide any additional information below.