Chateau,
You know that I the greatest respect for your work. However, this time you have laid an egg. I will not speak for Dr. Rox (he would not tolerate that anyway), but I can speak for myself and all the string of dates in this thread. Apparently, you have played Rip can Winkle while that was happening. You have to look at this from both ends and either way the conclusion that you are not one but TWO days behind is probable.
We know for a fact that Dec. 4 evening was the pit stop start time in Torino.
The evening of Dec. 5 was spend in transit by all teams and the Fussen pit stop started Dec. 6 afternoon.
Teams were released Dec. 7 am and headed for Baku. They reached there but did not have a leg until the morning of Dec. 8.
The next pit stop started the afternoon of Dec. 8.
Teams were released Dec. 9 am and it took until the following morning for teams to reach Ngrongoro Crater.
I have an extended pit stop (probably an extra 24 hours) while they were in Ngorongoro). You may not have assumed that but they have to have them.
That puts the start of leg 7 on Dec. 11, with a pit stop overnight in Mto Wa Mbu or Arusha (it really doesn't matter for date purposes).
Team fly to India and arrive Dec. 13 am, then do leg 9.
With an assumption of no extended pit stop in India teams start leg 10 Dec. 14 am (two days before you have it) and depart for Japan on
Dec. 15. If there is an extended pit stop in Kochi, then that departure would be Dec. 16.
They will arrive Dec. 16 (no India extended pit stop) or Dec. 17 (an Indian extended pit stop) and do leg 11, then enter another extended pit stop.
That takes us to either Dec. 18 or Dec. 19 departure from Osaka and the cross-the-International-Date-Line-west-to-east so they arrive same day.
Another way to look at this is top go backwards from the final tasks for the F3, which is know to be on Dec. 18. Go back across the International Date Line, which subtracts one day and it's Dec. 17. Take an extended pit stop in Japan and it's Dec. 16 starting that leg. Go back from Japan to India and it's Dec. 15, which is when teams leave India. The beginning of leg 10 will therefore by Dec. 14.