Based on the context and the answer, generate a question. 

Context: I decided that since school starts here tomorrow , it 's time to change my theme from summer to school . It wo n't be long and I 'll be putting up my fall themes . It 's kind of weird to see it getting dark so early . I always think back to Independence Day and it seems to take forever for the sky to get dark enough for fireworks .

Answer:

Summer is over .



Why is the narrator changing their theme ?