Mikejw:
Many things yes but not this, there is no way they can ever get out of the 1914 seventy weeks from 607thing.
It is true that they can’t easily abandon 1914, but not for this reason. The ‘70 weeks’ (from Daniel chapter 9) has no direct bearing on the determination of 1914. The jw interpretation of the 70 weeks (as with various other Christian denominations, particularly other Adventists) is that it began during the reign of Artaxerxes and supposedly identified Jesus as the messiah. The JW interpretation is particularly wrong because their year for the supposed beginning of the period is 10 years out.
See also Daniel's dreams and visions and What does the Bible really teach about Daniel’s 70 weeks?