Shí lìng literally combines shí (time, season) and lìng (command, decree), evoking the idea of 'nature’s seasonal mandate'—what is naturally appropriate or available at a given time of year. It most commonly describes foods, produce, or customs that are intrinsically tied to a specific season: for example, spring bamboo shoots or autumn mooncakes.

Beyond food, shí lìng can refer to seasonal climate patterns (e.g., humid summer heat) or traditional practices timed to agricultural cycles, such as spring planting festivals. Though it functions grammatically as both a noun ('the seasonality') and an adjective ('seasonal'), it rarely stands alone without context—it typically modifies nouns like cài (vegetables), shuǐguǒ (fruit), or fēngsú (customs). It carries a subtle cultural weight, implying harmony with natural rhythms rather than mere calendar timing.