Is there any special day that you are attending to the Chantries of Akatosh? I read somewhere that a certain emperor's son went to the different Divines' chapels at the appropiate days of the week or something.

We get almost all of our religious events from the holidays in daggerfall. If it isn't http://www.imperial-library.info/calendar/ then we don't know about it. One would assume the chief member of the Nine would be celebrated at some point or another, but who knows.