Read the excerpt below and answer the question.

Aunt Imogen was coming, and therefore
The children—Jane, Sylvester, and Young George—
Were eyes and ears; for there was only one
Aunt Imogen to them in the whole world,
And she was in it only for four weeks (5)
In fifty-two. But those great bites of time
Made all September a Queen’s Festival;

What mood is established in the opening lines of “Aunt Imogen”?

celebratory
detached
mysterious
ominous