Why not using ISO8601 format?

[yusufozturk]

For example, MM is always month. But in this library it is minute.

It's already insane that Golang does not use ISO8601 format. Then there is this library but it's also not using the standards.

Even your examples are weirdly wrong:

In one example you use MM for minute, in another you use for month. Also you don't have anything as "MMM" but weirdly it gives month?