I guess you are right, those post should be in a new year after the day start to increase. But for the purpose of blogging could be debatable what time system is better. Ideally since it's computers, we should use Unix timestamps that could (teoretically) be converted into any system people use/like locally in the browser. In reality, the decision is your, whatever feels right and makes you happy :)
Constructive critics I hope: Since New Year doesn't start at winter solstice it could be confusing to put year together with autumn. Plus you have posts from 2023 in 2024 section...I agree it doesn't have to be too structured though - for me I only added year and simplified at maximum all the html tags I wanted.
Perfect !! What was I even thinking, bullet points... I'll remove them too.