Task
 
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.



Related task

   Date format


open Unix
 
let months = [| "January"; "February"; "March"; "April"; "May"; "June";
      "July"; "August"; "September"; "October"; "November"; "December" |]
 
let () =
  let t = Unix.gmtime 0.0 in
  Printf.printf "%s %d, %d\n" months.(t.tm_mon) t.tm_mday (1900 + t.tm_year)