"Is it?" Liliana nodded once. "The nineteenth. So Earth months are thirty days long?"

Because why wouldn't you have uniform-length months? Otherwise would just be ridiculous.

"Oh, celebrations and gifts and the like. For most, it's usually a small gathering of friends and families, for the nobility or royalty, it's great feasts throughout the land. I remember my brother's--" The barest pause, a slight inhalation of breath "--tenth birthday was quite the festival, or though it seemed to me."