I am also having this problem. Has anyone found a work around for this to ignore the time portion of the date?
1. and , please create new questions for new problems!
2. search the forum for phrase like query list by date in ISO format.
here are some useful posts - https://community.nintex.com/search.jspa?q=query+iso&author=%2Fpeople%2F8567
if that doesn't help, proceed acc. point 1.
What was your work-around?