better date parsing

backend/Cargo.toml

@@ -45,6 +45,7 @@ quick-xml = "0.38"
 futures-util = "0.3"
 url = "2.5"
 once_cell = "1.19"
+regex = "1.11"
 utoipa = { version = "4.2", default-features = false, features = ["chrono", "uuid", "preserve_order"] }
 clap = { version = "4.5", features = ["derive"] }
 
@@ -63,10 +64,18 @@ serde_cbor_2 = "0.13"
 rand = "0.9"
 hyper = "1.2"
 http-body-util = "0.1"
+chrono-tz = "0.8"
 
 [dev-dependencies]
 once_cell = "1.19"
 webauthn-rs-core = "0.5"
+serde_yaml = "0.9"
+
+[build-dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_yaml = "0.9"
+serde_json = "1.0"
+regex = "1.11"
 
 [[bin]]
 name = "backend"