Sun: 日 (3)
日 is called ひ or ひへん and often relates to the sun, daylight, or time. 旦 means dawn, 晨 morning, and 暉 shining light; in 曹, the visible 日 is not a reliable clue to the whole character’s meaning.
日 has 4 strokes; in 旦, write the horizontal line below 日 last.