I know of the words 日 and 天, which both mean "day" in Chinese, but I'm not sure which to use in phrases such as "I've been in Taiwan for 25 days".
When I look in Wiktionary I'm even more confused:
- 日 is marked "literary or dialectal"
- 天 is marked "Obsolete sense in Modern Standard Chinese - may be preserved in fossilised compounds and expressions or other varieties of Chinese."
So which should I use for saying things like "I think I will stay two or three days"?
Maybe there's a third word I don't know about?