format a date in to the format 'yyyy-mm-dd hh:mm:ss.fff zzz' in rust

To format a date in Rust to the format 'yyyy-mm-dd hh:mm:ss.fff zzz', we can use the chrono crate. The chrono crate makes it easy to work with dates and times in Rust.

Here's an example code snippet:

main.rs
use chrono::{DateTime, Utc, TimeZone};

fn format_date(date: DateTime<Utc>) -> String {
    date.format("%Y-%m-%d %H:%M:%S%.3f %Z").to_string()
}

fn main() {
    let now = Utc::now();
    println!("{}", format_date(now));
}
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In this code, we define a function called format_date that takes a DateTime<Utc> object as an argument and uses the format method to format the date string in the desired format. The %Y specifier represents the year, %m represents the month, %d represents the day, %H represents the 24-hour hour, %M represents the minute, %S represents the second, %f represents the fractional second (in this case milliseconds), and %Z represents the time zone name. The to_string method converts the formatted string to a String object, which is then returned.

In the main function, we get the current UTC date and time using Utc::now() and call format_date to format it as a string in the desired format. Finally, we print the formatted date string using println!.