vernal

adjective2

1. •
   (formal, literary) Pertaining to or occurring in spring.

   • For as a vernall Larke, but lately drest / In her first Downe, abandoning her nest, / Stretchest her pinions, her small force assayes / Flutters, and fals before her flight shee raise, [...] — 1633
2. •
   (formal, figurative) Having characteristics like spring; fresh, young, youthful.

   • When after the long vernal day of life, / Enamour'd more, as more remembrance swells / With many a proof of recollected love, / Together down they [the seasons] sink in social sleep; [...] — 1749