Date to UNIX

use chrono::{NaiveDate, NaiveDateTime};

fn main() {
  let date_time: NaiveDateTime = NaiveDate::from_ymd(2017, 11, 12).and_hms(17, 33, 44);
  println!(
    "Number of seconds between 1970-01-01 00:00:00 and {} is {}.",
    date_time, date_time.timestamp());
  let date_time_after_a_billion_seconds = NaiveDateTime::from_timestamp(1_000_000_000, 0);
  println!(
    "Date after a billion seconds since 1970-01-01 00:00:00 was {}.",
    date_time_after_a_billion_seconds);
}