"Based on the date and on progression of spring in your region, it is likely a very rare "patched" Summer Azure.
It is definitely not Spring or Northern Azure. However, this form is frequent among Cherry Gall Azures.
But since I have not heard of any CGA reports yet (they will start flying in another 1-2 weeks),
I will bet on Summer Azure." per com Harry Pavulaan
Crooked Pond, Boxford, MA