午 (Kanji for noon) | KANJIDAMAGE

Onyomi

GO	Get Out of my house by noon!

Let's call the single line (upper left corner) a left sock. Thus:
Every NOON, I hang my left sock out to dry.

午前(ごぜん)

AM ★★★★★
午 (noon) + 前 (before) = 午前 (AM)

AM , before noon.

午後(ごご)

pm ★★★★★
午 (noon) + 後 (afterwards / behind) = 午後 (pm)

	Meaning	Hint	Radical
牛	cow	HEAD
午	noon	NO HEAD

The cow has a head that sticks up in the middle.

Noon does not have a head because it is an abstract concept, not a physical animal with four nipples.

I had to google that. This is my job.