Don't set the date when the hour hand is between 9pm and 3am (as a guide). Mechanical watches can have problems with setting the date the closer you get to midnight as it is in the process of moving the date wheel. Often this doesn't happen instantly at 12am but the date wheel can move slowly for some time before. Trying to set the date while it is 'engaged' in the process of automatically changing the date may damage the mechanism. There is a more technical explanation of what happens but I'm not a watchmaker and just know to keep away from that 'danger' period when changing the date.Third, when I'm setting the date it seems to want to stop halfway between the date, like it's half way between 21/22. I can eventually get it to sit correctly but it seems like a decent watch shouldn't have this as an issue?