Having the characteristics of something which can be seen, experienced, etc, every day or very commonly; commonplace, ordinary, mundane. [from 15th c.]
“The immeasurable joy generated by the most quotidian of family functions reinforces this commitment on a daily basis.”
“At the same time, I also felt some sympathy for an 18-year old who sounds a bit freaked out by the Blogosphere's focused attention on her quotidian activities.”