Prepare the herbs by finely dicing 1 tablespoons of each sage and parsley and picking 1 tablespoon of thyme leaves. Set aside the remaining herbs.
In a small bowl mash together softened butter, chopped sage and parsley and picked thyme leaves, zest of lemons and oranges and 1 tablespoon of salt and 2 teaspoons of ground black pepper and set aside.
To prepare the bird: Remove the neck and the giblets from inside the turkey and discard or save for another use. Place the turkey on a rack in a large roasting pan and using paper towels dry the skin. Gently run your fingers underneath the skin of the turkey breast to separate it as far back as you can, without breaking through the skin. Dry in between with a paper towel. Generously season the cavity of the bird with salt and pepper.
Rub half of citrus and herb butter underneath the skin of the turkey breast as far back as you can and rub the remaining all over the top of the bird. Season again the outside of the bird generously with salt and pepper.
Stuff the cavity with the remaining lemon wedges, orange wedges, horizontally sliced garlic head and herbs as much as you can fit.
Truss the turkey by tucking the wings underneath the turkey and tie together the legs with kitchen twine as tightly as you can.
Transfer the turkey to the refrigerator, uncovered, overnight or for a maximum of 24 hours