diff --git a/src/duration/parse.rs b/src/duration/parse.rs
index 3dddcd9..80847ee 100644
--- a/src/duration/parse.rs
+++ b/src/duration/parse.rs
@@ -330,5 +330,5 @@ fn parse_offset(s: &str) -> Result<Duration, HifitimeError> {
         }
     }
 
-    Ok(-(hours * Unit::Hour + minutes * Unit::Minute + seconds * Unit::Second))
+    Ok(hours * Unit::Hour + minutes * Unit::Minute + seconds * Unit::Second)
 }
diff --git a/src/efmt/formatter.rs b/src/efmt/formatter.rs
index a809ba6..cd9b08f 100644
--- a/src/efmt/formatter.rs
+++ b/src/efmt/formatter.rs
@@ -95,8 +95,8 @@ impl Formatter {
 
     pub fn with_timezone(epoch: Epoch, offset: Duration, format: Format) -> Self {
         Self {
-            epoch: epoch - offset,
-            offset: -offset,
+            epoch: epoch + offset,
+            offset,
             format,
         }
     }