The 60th off season schedule hasn't been announced yet, only October so far. And fireworks (DF on non-MHP nights, HS on party nights) are scheduled for every night (except for the CM party, I think) in October. So who knows what will happen starting in November!
As others have said, we do not yet know what the schedule will be for PtN and Disneyland Forever once HalloweenTime ends (although, it seems likely that they'll continue with nightly presentations through the Holiday Season because fireworks are typically presented nightly during that period). In terms of March, it's probably going to depend a lot on when in March you will be going to the parks. Easter is at the end of March this year, so the Spring Break Season schedule (when fireworks are presented nightly) will likely start sometime in early-to-mid March. I would guess PtN will also be presented nightly during the Spring Break Season, but the daily schedules won't start appearing until late-January to February (usually about 30-days in advance of the date for entertainment information, hours are posted about 45-days/6-weeks in advance).