China's date format isn't as good as ISO 8601. Let's ignore the 3 Chinese characters (年月日) for a moment. The problem is that the Chinese format does not use lea

China's date format isn't as good as ISO 8601. Let's ignore the 3 Chinese characters (年月日) for a moment. The problem is that the Chinese format does not use leading zero padding - e.g. 2021年5月8日 - which makes the format variable-length and much harder to sort.