Chinese numbers the days of the week, starting from 1 for Monday, but with a special name for Sunday, it seems.

I don't speak, or read, Chinese, but translate.google.com confirms this.

I am often curious about how Chinese expresses something, so I ask translate.google.com to translate an expression into Chinese, then I change the direction of translation and insert newlines between the Chinese characters. It's not a very reliable way of investigating how Chinese works, of course, but it's a lot faster than trawling through wiktionary.org. If anyone knows of a better way of getting an answer to that sort of question, please reply here!