12.2.1. 检查日期和时间
通过 Timelike
获取当前 UTC DateTime
及其时/分/秒,通过 Datelike
获取其年/月/日/工作日。
use chrono::{Datelike, Timelike, Utc}; fn main() { let now = Utc::now(); let (is_pm, hour) = now.hour12(); println!( "The current UTC time is {:02}:{:02}:{:02} {}", hour, now.minute(), now.second(), if is_pm { "PM" } else { "AM" } ); println!( "And there have been {} seconds since midnight", now.num_seconds_from_midnight() ); let (is_common_era, year) = now.year_ce(); println!( "The current UTC date is {}-{:02}-{:02} {:?} ({})", year, now.month(), now.day(), now.weekday(), if is_common_era { "CE" } else { "BCE" } ); println!( "And the Common Era began {} days ago", now.num_days_from_ce() ); }