ddt
Mafia Penguin
I don't think that will turn out right.After the actual count gives Hillary the win by delegate count (not super delegate) alone? That'd be the third choice, mid to end of April.
This 538 page tracks the progress of both candidates. As you can see, Hillary performs now on 114% of target, and if you track the graphs that is quite consistent in the process thus far.
She needs 2026 pledged delegates to secure a majority of pledged delegates. Even on 5 June, i.e., two days before California, NJ and a couple of other states, the tracker puts her target at 1673,5. Add 14% (what she's above target) and you get 1908, i.e., below the majority of pledged delegates.
The margins are sufficiently small that the huge number of delegates that is decided on on 7 June could upset the lead. So my vote goes to "Early June after California".