[qwertox]

Is `timezone` optional? I like it that it has the ability for one to provide it, but not providing it could just use the one the system has been configured to use.

[tison]

Yeah. Actually, this is possible to extend the interface with options to accept

1. Optional Timezone.

2. Second-level precision (perhaps feature flags are more suitable here)

It just falls out my first requirements so I don't support it. Being too generic is a common source of failure in my experience.

As a library developer I have my opinion on how things should be done and provide the default fits that mind :D