“daytime / noon” in Japanese is 昼, read chuu, hiru (ちゅう, ひる). It is a Grade 2 Kyōiku kanji, taught in year 2 of Japanese elementary school, and appears in words such as 昼食 (lunch).
What does 昼 mean?
昼ごはんを食べる。
Same sound, different character — the classic trap. Compare them side by side: