“天”是一个象形字。甲骨文和金文中的“天”字,像一个正面而立的人,特别突出了人的头形。在金文中,“天”字字形用一个圆形来表示头部,而在甲骨文中,为了刻写方便,就用一个方形或一横画来表示头部。到了小篆时,头部的方形或圆形简化成一横。如下图: “Day ” is a pictograph. The word “天” in Oracle and Goldwind, like a positive person, highlights the human head. In gold, the “day” glyph uses a circle to represent the head, while in Oracle, a square or a horizontal bar represents the head for ease of writing. To the small seal, the head of the square or circular simplified into a horizontal. As shown below: