# A tiny datetime  week clender and timestamp conversion tool by rust.

## from format str to create the time string
- format dis
   - %Y : year
   - %m : month
   - %d : day
   - %H : hour
   - %M : min
   - %S : sec

## get now time with timezone
```rust
use cvdate::CvDate;

//local timezone
let x = CvDate::now().format("%Y-%m-%d %H:%M:%S"); 
println!("{}",x); //return now time string: "2021-02-28 16:51:29"
let x = CvDate::now().get_timestamp(); 
println!("{}",x); //return now timestamp: 1614502462
//get time with timezone
let x = CvDate::now_with_tz(8).format("%Y-%m-%d %H:%M:%S"); 
println!("{}",x); //return now time string: "2021-02-28 16:51:29"
let x = CvDate::now_with_tz(8).get_timestamp(); 
println!("{}",x); //return now timestamp: 1614502462
```

## timestamp to datetime of CvDate
```rust
use cvdate::CvDate;

//let d = CvDate::new(1582939726);//if only local timezone
let d = CvDate::new_with_tz(1582939726, 8);
assert_eq!(d.get_date(), "2020-02-29");
assert_eq!(d.get_time(), "09:28:46");
assert_eq!(d.get_date_time(), "2020-02-29 09:28:46");
assert_eq!(d.get_week(), 6);
assert_eq!(d.get_time_zone(), 8);
assert_eq!(d.format("%d/%m/%Y %H:%M"), "29/02/2020 09:28");
assert_eq!(CvDate::is_leap(2020), true);
assert_eq!(CvDate::is_leap(2021), false);
```

## datetime string to datetime of CvDate
```rust
use cvdate::CvDate;

//let d = CvDate::new_with_str("%Y/%m-%d %H:%M:%S","2020-07-29 15:23:27");//if only local timezone
let d = CvDate::new_with_str_tz("%Y/%m-%d %H:%M:%S","2020-07-29 15:23:27", 8);
assert_eq!(d.get_timestamp(), 1596007407);
assert_eq!(d.get_date(), "2020-07-29");
assert_eq!(d.get_time(), "15:23:27");
assert_eq!(d.get_date_time(), "2020-07-29 15:23:27");
assert_eq!(d.get_week(), 3);
assert_eq!(d.format("%d/%m/%Y %H:%M"), "29/07/2020 15:23");
assert_eq!(CvDate::is_leap(2020), true);
assert_eq!(CvDate::is_leap(2021), false);
```
## datetime from one zone to other
```rust
use cvdate::CvDate;

//timezone east 8 str time to other area
let x = CvDate::new_with_str_tz("%Y-%m-%d %H:%M:%S","2020-02-29 05:23:27", 8);
//timezone east +9
assert_eq!(CvDate::new_with_tz(x.get_timestamp(), 9).get_date_time(), "2020-02-29 06:23:27");
//timezone west -10
assert_eq!(CvDate::new_with_tz(x.get_timestamp(), -10).get_date_time(), "2020-02-28 11:23:27");
```
## from year and month to get clender
```rust
use cvdate::CvDate;

assert_eq!(CvDate::get_clender(2020,2),
[(1,6),(2,7),(3,1),(4,2),(5,3),(6,4),(7,5),(8,6),(9,7),(10,1),(11,2),(12,3),(13,4),(14,5),(15,6),(16,7)
,(17,1),(18,2),(19,3),(20,4),(21,5),(22,6),(23,7),(24,1),(25,2),(26,3),(27,4),(28,5),(29,6)]);
```