We have reached our five-year anniversary of producing these podcasts, and (in true meta fashion) thought we would celebrate by analysing why we recognise such occasions.

At the point of recording this podcast, there have been 241 episodes of the Cognitive Engineering podcast and nearly 100,000 listens. For some reason, though, we find it much more significant that this achievement has taken us five Earth years to complete. In this podcast, we examine why humans are drawn to recognise the passing of the years and whether it is useful to do so.

A few things we mentioned in this podcast:

- Places with the least seasonal variations
- Javanese calendar

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