My Lady Emma H. is nowhere near having a bud, South West France. We are still having temps of -5° and heavy frosts in the morning, although the sun is coming out, at last, in the afternoon.
Paul's Scarlet is usually my first and it flowers massively for a month, just once, in May. A friend has rosa Banksiae Lutea which flowers in April.
Etoile d'Holland is nearly always first in my North Yorkshire garden.