Left: recovery of the cluster samples obtained from the literature (T. Cantat-Gaudin et al. 2020; E. L. Hunt & S. Reffert 2023; L. Cavallo et al. 2024; P. R. Van-Lane et al. 2024). Middle: same as left but in logarithmic scale. Right: ages obtained from [C/N] compared to those from rotation periods using the relations calibrated in this work for the same clusters. After correcting for bias for [C/N] and gyrochronology as shown in Figure 10, we are able to achieve agreement between the cluster ages determined from both methods. However, more data are needed to perform better comparisons.