This is a comment on an issue discovered.
This issue has been noted that when importing files with dates (without time specified) into a Notes App, the dates are imported with the time zone of GMT. Then when the app displays the date to the user, it is offset by accounting for local time.
As an example, a date of 01/01/2009 is imported. The app sees the field holding the value of 01/01/2009 12:00AM GMT. When the end users looks at the field, if they are in the Central (CST) time zone, the date will show as 12/31/2008 since they are 6 hours behind GMT.
The work around is to prep the import file by including a time (and zone if possible) to the date fields before importing into the Notes app.
Versions prior to 8.5 did not have this issue.
It is on the list to be fixed in 8.5.2 per SPR# HKAI7UW6YD: “When import date without time (YY/MM/DD), Time zone is always set as GMT”