```rust use chrono::{Duration, Utc}; let now = Utc::now(); let yesterday = Utc::now() - Duration::days(2); let nows = format!("{}", now.format("%Y%m%d")); let yesterdays = format!("{}", yesterday.format("%Y%m%d")); ``` ```rust let until = Local::now(); let since = Local::now() - Duration::days(90); let until_qb = format!("{}", until.format("%Y-%m-%d")); let since_qb = format!("{}", since.format("%Y-%m-%d")); println!("since: {}", since_qb); println!("until: {}", until_qb); ``` 31.08.23

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