DEAR MISS MANNERS: With things improving with COVID, we are suddenly receiving invitations for children’s birthday parties. We haven’t gone to any before, because our child was too young, and now I’m realizing there doesn’t seem to be a standard rule for time of arrival. Do we arrive approximately 15 minutes, late like a normal house party or dinner party, or does it depend on the venue? GENTLE READER: Do you want to be the one to explain “fashionably late” to a small child who is beginning to think that no one will show up and imagining humiliating reasons why? For that matter, try explaining…
