add chrono

chrono/src/main.rs

@@ -0,0 +1,21 @@
+use chrono::prelude::*;
+
+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(())
+}