Don't serialize unix timestamps

I was recently reading an API guide and came across this funny example:

What’s funny is that as a human, I have no idea when 1607450357 is. I’m just not that good at math. Unix timestamps are not legible to people which makes debugging slower. Instead, one should always serialize dates as ISO8601, so that the created date is:

2020-12-08T17:59:17Z

which is immediately readable to people, just as precise and unambiguous, faster to debug, and faster to code.