sqlite due comparisons don't consider timezones

[WhyNotHugo]

Since dates are stored as strings in sqlite, timezones aren't taking properly accounted for when comparing datetimes. (this was revealed by df24af8)

[WhyNotHugo]

Actually, I found the issue and it's not that: the actual issue is that the test is badly written assuming that the current timezone is CET.

Still, my code was broken and the above commit exposed it. 😢

[untitaker]

Impressed that you found this so quickly! 👍

[WhyNotHugo]

Thanks. TBH, I recalled that sqlite had no proper datetime format, but rather stored strings, so I'd assumed it somehow stemmed from there.