error[E0277]: the trait bound `DateTime<Utc>: Serialize` is not satisfied
    --> src\main.rs:10:11
     |
10   | #[derive( Serialize,  Deserialize  , Debug )]
     |           ^^^^^^^^^ the trait `Serialize` is not implemented for `DateTime<Utc>`
11   | struct DateStringPair {
12   |     date: DateTime<Utc>,
     |     ---- required by a bound introduced by this call
     |
     = note: for local .....

     |
1864 |     fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<(), Self::Error>
     |        --------------- required by a bound in this associated function
1865 |     where
1866 |         T: ?Sized + Serialize;
     |                     ^^^^^^^^^ required by this bound in `SerializeStruct::serialize_field`
     = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `DateTime<Utc>: Deserialize<'_>` is not satisfied
    --> src\main.rs:12:11
     |
12   |     date: DateTime<Utc>,
     |           ^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `DateTime<Utc>`
     |
     = note: for local typ....

// edition = "2024"
// [dependencies]
// chrono = "0.4.40"
// serde = { version = "1.0.219", features = ["derive"] }
// serde_json = "1.0.140"

use chrono::{DateTime, Utc};
use serde::{Serialize, Deserialize};

#[derive( Serialize,  Deserialize  , Debug )]
struct DateStringPair {
    date: DateTime<Utc>,
    string: String,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {

    Ok(())
}

(Playground)

Errors:

   Compiling playground v0.0.1 (/playground)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
     Running `target/debug/playground`

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