port to time-1.5

ehem... you might want to consider using pvp ;-)
Thanks for trying this out, `False` certainly looks better now.

> i meant, not using a flag at all and depend on `old-locale` without using it.

I meant whether you think that's a better solution than using the flag.

My first guess is that it might be because we can still remove it in the future and switch to another solution, while introducing a flag now will already influence the constraint solver.