That's great, Victor!  Another person trying the code with their own critical eyes would still be prudent.  Two days ago you wrote:

> This part of Python (handling timestamps, especially
> the rounding mode) is complex, I prefer to check for
> all buildbots and wait for some feedback from users
> (wait at least 2 weeks).

It's not entirely clear why that switched to "So I'm confident on the change." in 12 days short of 2 weeks ;-)

I have no reason to doubt your confidence.  Just saying some independent checking is prudent (but I can't do it at this time).