Contrast with Western “Sunday”: While the English “Sunday” is named after the Sun, the Chinese `星期天` is part of a more systematic naming convention for the week. The term itself is secular. However, there is another common term, `礼拜天 (lǐbàitiān)`, which literally means “worship day,” stemming from the influence of Christian missionaries. While `礼拜天` is still widely used, `星期天` is the most neutral and common term across mainland China. The most formal term, `星期日 (xīngqīrì)`, uses the character for “sun” (`日`), making it a more direct parallel to the English “Sunday,” but it's primarily used in writing.