... So I bit the bullet last night and started to adjust the watch to see when the date would turn over. And sure enough, it does start to turn at about three minutes before midnight and fully turns over just before the strike of 12. However, the watch can also adjust the date backwards, something that has traditionally been quite harmful to a timepiece's mechanism. And so, it looks like there is a bit of "slack" just before the midnight turnover and just after the midnight turnover to address the internal mechanics necessary to pull off such a feat. The only other watches I have ever seen that are able to adjust the date backwards come from JLC - and only on the high end, like the Master Tourbillons, et al, and they behave in exactly the same way.