```
use std::time::SystemTime;
fn main() {
let no_leap_second = [
1970, 1971, 1980, 1984, 1986, 1988, 1991, 1996, 1999, 2000, 2001, 2002, 2003, 2004, 2006,
2007, 2009, 2010, 2011, 2013, 2014,
];
let sys_time = SystemTime::now();
println!("Time:{:?}", sys_time); //Time:SystemTime { tv_sec: 1718014136, tv_nsec: 591331000 }
let duration_since_epoch = sys_time
.duration_since(SystemTime::UNIX_EPOCH)
.expect("Time went backwards");
let mut total_seconds = duration_since_epoch.as_secs();
let beijing_time = 28800;
total_seconds += beijing_time;
let one_year = 365 * 86400;
let one_leap_year = 366 * 86400;
let mut year = 1970;
loop {
if is_leap_year(year) {
if total_seconds >= one_leap_year {
total_seconds -= one_leap_year;
} else {
break;
}
} else {
if total_seconds >= one_year {
total_seconds -= one_year;
} else {
break;
}
}
if year == 1972 {
total_seconds -= 2;
} else if no_leap_second.contains(&year) {
} else {
total_seconds -= 1;
}
year += 1;
}
let big_month = 31 * 86400;
let small_month = 30 * 86400;
let no_leap_month = 28 * 86400;
let leap_month = 29 * 86400;
let mut month = 1;
loop {
if (is_leap_year(year)) && (month == 2) {
if total_seconds >= leap_month {
total_seconds -= leap_month;
} else {
break;
}
} else if (!is_leap_year(year)) && (month == 2) {
if total_seconds >= no_leap_month {
total_seconds -= no_leap_month;
} else {
break;
}
} else if (month == 4) && (month == 6) && (month == 9) && (month == 11) {
if total_seconds >= small_month {
total_seconds -= small_month;
} else {
break;
}
} else {
if total_seconds >= big_month {
total_seconds -= big_month;
} else {
break;
}
}
month += 1;
}
// 计算日
let day = total_seconds / 86400 + 1; // 直接计算日，注意加一
println!("year:{year}");
println!("month:{month}");
println!("day:{day}");
}
fn is_leap_year(year: i32) -> bool {
(year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)
}
```

```
douxiaobo@192 Rust % rustc read_now1.rs
douxiaobo@192 Rust % ./read_now1
Time:SystemTime { tv_sec: 1718024261, tv_nsec: 366448000 }
year:2024
month:6
day:9
```

This is Beijing_time, In fact Today is June 10, 2024. I am confused that I can not find any problem in My Rust code.