... in response to When does the K-1 visa time start., posted by Oatmeal on Dec 6, 2001Your fiance has six months after the visa is issued to use it to enter the U.S.
Once s/he has entered, you have 90 days to marry. It is also best to file AOS within those 90 days to make sure there is no out-of-status time. To do that, it is helpful to get the marriage certificate from the presiding official at your wedding and take it to the registering authority yourself. That way you can get a certified copy on the spot, rather than waiting weeks for it to be mailed.