Stellar rotational periods over time for both metallicities Z = 1 Z_⊙ (solid lines) and Z = 0.2 Z_⊙ (dashed lines). The yellow, red, and blue lines indicate models with Ṁ_start = [1 × 10⁻⁹, 5 × 10⁻⁹, and 1 × 10⁻⁸] M_⊙ yr⁻¹, respectively. For low metallicities, stellar spin-up due to contraction (post-disk contraction, pdc) until the disk lifetime of the solar metallicity is reached is indicated by colored dotted lines.