In contemporary English, you now normally capitalize the names of the seasons only when they are personified. For personification, think of âpoeticâ or âcreativeâ uses, where the season is thought of as possessing the characteristics of a person, and so becomes a proper noun meriting a capital letter. 1  In March, Spring shows her joyous moods. 2  All Nature hides from Winterâs icy breath. 3  We will muse on Summerâs ploys: