diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index 7857445..7820615 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -5980,6 +5980,7 @@ dependencies = [
  "argon2",
  "async-trait",
  "chacha20poly1305",
+ "chrono",
  "docx-rs",
  "futures-util",
  "getrandom 0.2.17",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index c8d6390..d4e9803 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -27,6 +27,9 @@ tokio = { version = "1", features = ["rt-multi-thread", "macros", "sync", "time"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 uuid = { version = "1", features = ["v4"] }
+# Local<->UTC, DST-aware — needed for calendar recurrence (T6.2); already in
+# the dependency tree transitively (sqlx), this just promotes it to direct.
+chrono = { version = "0.4", default-features = false, features = ["clock"] }
 
 # storage
 sqlx = { version = "0.8", features = ["runtime-tokio", "sqlite", "migrate"] }