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In this work, we compare star formation histories of massive (10.5 $<\log(\mathrm{M_*/M_{\odot}}) <$ 12) galaxies in the UniverseMachine model tothose measured from the Large Early Galaxy Astrophysics Census (LEGA-C) at$0.6<z<1$. Following the LEGA-C study, we investigate how 50% ($t_{50}$) and90% ($t_{90}$) formation timescales depend on total stellar mass. We find goodagreement between the observed and model timescales for the star-formingpopulation $\Delta\,t_{SF}\lesssim1\,\mathrm{Gyr}$ across the full mass range.In contrast, the observed age-mass correlation is weaker for the quiescentpopulation compared to UniverseMachine models ($\Deltat_{Q}\lesssim2\,\mathrm{Gyr}$), especially at the high-mass end. This indicatescontinued star formation or additional processes in the most massive quiescentgalaxies, a behavior not accounted for in the UniverseMachine model.

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