出于各种原因，父母阻止孩子多上一年幼儿园，被称为“红衫军”。 Parents hold children back from starting kindergarten an extra year for various reasons, known as "redshirting."

红衫军（Redshirting）一词最初用于大学生推迟大学运动，现在是指父母出于社交、情感或发育迟缓等原因，或为了确保他们的孩子不是班上最年幼或最矮的孩子。 Redshirting, a term originally used for college students delaying varsity sports, now refers to parents holding their child back from starting kindergarten an extra year for reasons such as social, emotional, or developmental delays, or to ensure their child is not the youngest or shortest in the class. 幼儿园年龄截止日期因州而异，虽然一些父母可能会考虑穿红衫以获得优势，但低收入家庭可能需要孩子上学以减少高昂的日托费用。 Kindergarten age cut-off dates differ by state, and while some parents may consider redshirting for advantages, lower-income families may need children in school to reduce high daycare costs.