State tax filing

Thanks! 

I have a few questions about the residency periods for both New Jersey (NJ) and Delaware (DE). Since I moved to Delaware in June and my husband moved there in November, what dates should I list for the residency periods for each state? I am filing jointly for both states.

 

1. When filing the DE joint tax return, it asks for the part-year resident dates. Should I enter my dates (June 24 – Dec 24) or my husband's (Nov 24 – Dec 24)? 

2. Same for the NJ tax return—whose part-year resident dates should I use?

3. We have some interest earned last year. How do I allocate it?