日

• Astronomical: The sun as a physical celestial body.
• Temporal: Daytime or light (as opposed to night).
• Calendrical: A single day (24-hour cycle) or a specific date of the month.

• Measure word: Used to count days.
• Adverbial: Indicates frequency or timing (e.g., "daily" or "by day").
• Temporal anchor: Serves as a marker for the date.

• 日 vs. 晝: Both can refer to daylight hours, but 晝 specifically denotes the duration of light, whereas 日 may emphasize the sun as the source of that light.
• The 日/月 Binary: When paired with 月 (moon/month), the glyph often represents cosmic balance or serves as shorthand for "the universe" and "all time."

Avoid defaulting to "day" in English translation. If the glyph behaves as an active agent—specifically if it is rising, setting, or exerting physical influence (e.g., scorching)—it likely refers to the physical sun rather than a unit of time.