One year is different from another year. This is the maritime street where I live, picture from last year February 27. A cold month of March was to follow:
This is this year, March 7, same place, looking from the opposite direction (so now also people on this forum get a better idea of these Friesian surroundings):
Honeyberries are very susceptible to how the late winter is in places that are south of what they're used to. Last year, here the cold month of March put a hold on the development of their buds, and only late April flowering started. This year... February saw the first lapwing eggs being found! Never before has this happened in February; the first lapwing eggs in The Netherlands were found here in the north, in Fryslân.
And also my first honeyberry started to flower in February:
That's Indigo Gem, which is not a variety I would recommend in a climate zone relatively warm to haskap. I haven't even spotted bees yet.
Duet is also quite early; pictured today (March 7, 2019):
This Aurora is still very small, also today:
When they get older and have grown a bit higher, they should start to develop a bit later. Anything that's more exposed develops later.
This picture of the Beauty shows that quite well; development is first in the lowest branches:
My Beast grew best and all branches shot up straight away, and now there little budding out there yet.
Growth habit is probably something to take into account if you happen in a relatively warm area; some varieties grow taller than others, and the ones that remain a bit smaller should experience more problems with premature flowering. And if you have plants that are still young and they bud out early; it might sort itself out over the years as they grow bigger and taller.