Serving content based on time of day
Countdown timers have been around in emails for some time now so time-based content is possible. However I have just had a thought (not sure if it's already being done or not) about using this method for accessability.
You know how you can set your iPhone to make the screen more orangey on a night so it's less strain on your eyes? Well this is the principle of my idea.
It would be to change the styling or whole blocks of content so if you were reading your emails late at night you would be viewing a darkened/warmer version of the same email if you read it during the day.
Has anyone tried anything like this before or know how you would even do it? Guessing a service like Moveable Ink?
Just a thought.