Problem Statement

Choose popular date libraries used by your language and show the   epoch   those libraries use. A demonstration is preferable   (e.g. setting the internal representation of the date to 0 ms/ns/etc.,   or another way that will still show the epoch even if it is changed behind the scenes by the implementers),   but text from (with links to) documentation is also acceptable where a demonstration is impossible/impractical. For consistency's sake, show the date in UTC time where possible.

Let's start with the solution:

import java.util.{Date, TimeZone, Locale}
import java.text.DateFormat

val df=DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, Locale.ENGLISH)
df.setTimeZone(TimeZone.getTimeZone("UTC"))
println(df.format(new Date(0)))