I have reproduced the issue in more than one SP2013 environment, so I don't think this is a false positive involving user error. That said,Cassy Freeman has confirmed for me that Nintex UK > Nintex USA.
Odd as it sounds; I seem to have viewed a time difference of about four hours between servers. And, I am wondering if that difference impacts this at all. I am having the same problem. A date only is one thing in one list and one day less in the other. I know Sharepoint and Nintex treat the date as midnight of the first day. I wonder if somehow that four hour difference is impacting.
Jeff Vojtko – what's odd here is we're never leaving the context of this site collection (two lists in the same site). It's got to be something with translation from SP column to nintex wf variable and back to SP column.
I'm having the same issue. I think maybe I'll just add a day with the workflow so when it creates the item it's the correct date.
Patrick Abel, were you able to resolve the issue or did you use a similar work around?
I was able to resolve this issue by adding a "Add time to Date" action that doesn't actually manipulate time in the variable. I didn't add any days, hours, minutes, etc. to the date variable, but simply including this action and re-set the date to the same variable.
This resolved the one day off issue for me (I've seen this a time or two with clients).