Hermione got her information faster than most people. She was a little anal about knowing what was going on. She felt stupid if someone knew something about the war that she didn't. Especially considering she and Ron were like the protectors of the hope of the whole Wizarding World. How could they help Harry end the war if they didn't know what was going on? That was how Hermione rationalized it anyway, really it was probably just paranoia after all this time.
"Birthday party? That's fantastic. I think everyone needs a little break." Well she hoped it would be fantastic. She just wanted to see everyone. She would feel a lot better if she could see Fred and Sirius for herself. And Ron especially.