day lark

Meanings:

• 1.

  UKHistoricalrareinformal
  • A seldom-used expression referring to a playful, spontaneous, or light‑hearted activity undertaken during the daytime.

• 2.

  Worldwiderareneutral
  • Occasionally used to denote a person who is lively or active during the day; comparable to 'day person' as opposed to a 'night owl'.