Calla Lilies don't and won't bloom for labor day weekend.... it is also very unrealistic to have any kind of sunflower blooming in November in Ohio even with cover.
I have grown plants and flowers as a professional to sell my entire life and when anyone requests specific flowers for a specific date my answer is always always always NO. If you think you can defy the laws of nature, give it a try but unless you are a trained grower and have done this sort of thing on a regular basis I wouldn't recommend 'trying it' - you won't be happy with the results. I honestly wish I had more positive information for you - to be certain of the flowers you want for your dates you will most likely have to purchase the finished plant material. It will save you a lot of grief.