A:AnswerThe "stand" you are mentioning is not meant to use as a bottom for the clock. What you are calling stand is meant to stand alone on its own, to get better reception for the radio.
A:AnswerThe clock has dual alarm settings for weekend use, if that's what you mean.As for leap year, I don't know - I haven't had it more than 1 month!
A:AnswerIt comes in the box already assembled, other than snapping the base onto the loop once you have let out the length of antenna cable that you want.