pub fn parse_datetime(s: &str) -> Option<PrimitiveDateTime>Expand description
Parse a FITS civil date/time (YYYY-MM-DD[Thh:mm:ss[.fff]]), timezone-naive.
§Examples
let dt = fits_header::parse_datetime("2026-07-11T22:15:03").unwrap();
assert_eq!(fits_header::format_datetime(&dt), "2026-07-11T22:15:03");
assert!(fits_header::parse_datetime("2026-07-11").is_some()); // date-only → midnight