Incorrect timestamps after re-importing a backup on a machine with a different timezone

When exporting data on a machine with timezone UTC+10 and importing it again on a machine with timezone UTC+2 all timestamps are off by 8 hours (note: they will show e.g. 4:30 pm on both machines regardless of the timezone).
This causes issues with JIRA Agile data which is stored as unix timestamps and does not contain a timestamp by definition, those are imported correctly with the right offset.

Steps to reproduce:

1. Set timezone to UTC+10
2. Export data
3. Stop JIRA
4. Set timezone to UTC+2
5. Start JIRA
6. Import data

Symptoms

• Agile charts do not list the correct issues, and the graphs are also incorrect.
• Issue dates such as created, updated are also incorrect.