What JWs and other fundies usually bring up is Luke 3:15 -- which btw does not allude to Daniel at all, but only points to the general idea of messianic expectation about that time:
As the people were filled with expectation, and all were questioning in their hearts concerning John, whether he might be the Messiah...
The connection of the seventy weeks with Jesus' time only emerges with some Church Fathers. A few quotations here:
http://www.preteristarchive.com/StudyArchive/d/daniel_seventy-weeks.html