Translations:Upgrade from version 6 to 7/93/en
From LimeSurvey Manual
Time zone changes
In version 6 and earlier recorded timestamps were undetermined regarding timezone and depended on the server date/time. With migration to version 7 the old 'Time difference' setting is migrated if possible, and all timestamps going forward are recorded as UTC timestamps. Old timestamps are not migrated. It is possible to set a global timezone as default in global settings and an individual one can be set per user. These apply only on the display of data. Export and RemoteControl API will only accept/deliver the raw timestamps.