Welcome to the forums & server
I could be wrong, but generally speaking, Ive been told that dayz and six launcher dont like one another much!
as for the server connection issues, I really couldnt help, I have had no issues connecting, the server tends to get reset a couple of times a day, and yes, the timezone can go out of sync.
sometimes we edit it, for eg, if we are choosing to do 'night ops' but for the most part its meant to run -5. meaning evening play is still daytime
as for the server connection stuff, Ill let far smarter people guide you!