I'm surprised I hadn't heard of this app before; it basically takes advantage of the notification center to give you a date widget (as well as a "today in history" note, if you're into that) in your drop down center.
Not for me but thought someone might like it.
https://itunes.apple.com/us/app/date-notifier/id495599776?mt=8&at=10l3Vy
Not for me but thought someone might like it.
https://itunes.apple.com/us/app/date-notifier/id495599776?mt=8&at=10l3Vy