diff --git a/Cargo.lock b/Cargo.lock
index 0e3e533..bba54b9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -76,7 +76,7 @@ checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
 
 [[package]]
 name = "beemo-join-time-diff"
-version = "0.1.0"
+version = "4.0.0"
 dependencies = [
  "anyhow",
  "chrono",
diff --git a/src/main.rs b/src/main.rs
index 5dad4a2..082fc6d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -57,11 +57,13 @@ fn main() -> Result<()> {
     };
 
     for (idx, join_date) in matches.iter().enumerate() {
+        // Add the date to add a valid DateTime.
         let mut date: DateTime<Utc> = DateTime::parse_from_str(
             &format!("{}T{}", log_date, join_date),
             "%Y/%m/%dT%H:%M:%S%.3f%z",
         )
         .with_context(|| format!("Could not parse date `{}T{}`", log_date, join_date))?
+            // Convert to UTC.
         .try_into()
         .with_context(|| format!("Could not parse date `{}T{}`", log_date, join_date))?;