A test is currently failing because it relies on Sidney Tz.
from the internet :
```
Daylight Saving Time begins at 2 am (AEST) on the first Sunday in October and ends at 3 am (Australian Eastern Daylight Time) on the first Sunday in April.
```
Due to that - there's one hour missing in the tests - and the test `6
days are acceptable` is failing.
Changing to another timezone to fix the situation, it would require a
longer-term solution or making sure it cannot happen anymore.
