timestamp.zh.md

将日期转换为 Unix 时间戳，反之亦然

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NaiveDate::from_ymd和NaiveTime::from_hms给出一个日期，用NaiveDateTime::timestamp转换到UNIX 时间戳。然后使用NaiveDateTime::from_timestamp，它计算从 1970 1，01 0:00:00 UTC 开始，10 亿秒后的日期。

extern crate chrono;

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);
}