I actually asked someone in a local IWC boutique the same question. Apparently if you wind it too far forward either you get one free “do-over” where they’ll send it back and reset it for you. The other option is waiting until the date that you wound it to comes around and then wearing it again
I’ve always wondered, how much is the service to adjust the calendar if one accidentally sets it ahead of time?
I actually asked someone in a local IWC boutique the same question. Apparently if you wind it too far forward either you get one free “do-over” where they’ll send it back and reset it for you. The other option is waiting until the date that you wound it to comes around and then wearing it again