use chrono::prelude::*;

// https://crates.io/crates/chrono
fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("UTC time:            {}", Utc::now());
    println!("UTC time:            {:?}", Utc::now());
    println!("UTC time(RFC2822):   {}", Utc::now().to_rfc2822());
    println!("UTC time(RFC3339):   {}", Utc::now().to_rfc3339());
    println!("Local time:          {}", Local::now());
    println!("Local time:          {:?}", Local::now());
    println!("Local time(RFC2822): {}", Local::now().to_rfc2822());
    println!("Local time(RFC3339): {}", Local::now().to_rfc3339());

    println!("{}", "2020-01-01T12:00:00Z".parse::<DateTime<Utc>>()?);
    println!("{}", "2020-01-01T12:00:00+08:00".parse::<DateTime<Local>>()?);

    println!("Current timestamp(secs):   {}", Utc::now().timestamp());
    println!("Current timestamp(millis): {}", Utc::now().timestamp_millis());
    println!("Current timestamp(nanos):  {}", Utc::now().timestamp_nanos());

    Ok(())
}