SFR of the GALACTICA simulated galaxy explored in Park et al. (2021) normalised to a total mass of 1 M_⊙. The grey histogram represents the reported SFR, while the solid blue curve corresponds to the smoothed version of the interpolated curve (solid black line). The fit of the smoothed curve is represented by the dashed red line. The positions of the maxima, t_max, used in the determination of t_k (see the text) are indicated by the vertical dashed lines.