Distribution of bar ages derived in this work. We display our main results (total, black line), colour-coded by low- and high-SF sub-samples (yellow and purple, respectively). At the top, we present the median bar age of each sub-sample, together with the standard deviation of each distribution (high-SF: 4.0±2.0 Gyr; low-SF: 9.3±3.6 Gyr). It is clear that low-SF nuclear discs are hosted by older bars (typically older than 9 Gyr), whereas high-SF nuclear discs are hosted by younger bars. Additionally, we derive a large range of bar ages, varying from 1−13 Gyr, illustrating that bars started to form in a young Universe (∼1 Gyr), and that this is an ongoing process in the Local Universe.