I like the circular feel of this poem. It's fun to see and feel the author or the speaker pondering and seeing the thought process as the speaker tries to work through "It was something else." In the end it's just "another September day" seems like a pretty profound idea. The speaker has realized that he/she is the one who put all the weight on the "It was something else." The idea only existed in the person's mind, but now you've stretched to other people through the poem!