diff --git a/Cargo.lock b/Cargo.lock
index 5a94ec7..ca2ee2d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -344,7 +344,7 @@ dependencies = [
 
 [[package]]
 name = "fastexcel"
-version = "0.9.0"
+version = "0.9.1"
 dependencies = [
  "anyhow",
  "arrow",
diff --git a/Cargo.toml b/Cargo.toml
index e557bee..db68117 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "fastexcel"
-version = "0.9.0"
+version = "0.9.1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/src/types/excelsheet.rs b/src/types/excelsheet.rs
index 48c8b22..25f3e3f 100644
--- a/src/types/excelsheet.rs
+++ b/src/types/excelsheet.rs
@@ -188,12 +188,6 @@ fn create_float_array<DT: CellType + DataType>(
         (offset..limit).map(|row| data.get((row, col)).and_then(|cell| cell.as_f64())),
     ))
 }
-//  match cell {
-//     CalData::String(s) => Some(s.to_string()),
-//     CalData::Float(s) => Some(s.to_string()),
-//     CalData::Int(s) => Some(s.to_string()),
-//     _ => None,
-// }))
 
 fn create_string_array<DT: CellType + DataType>(
     data: &Range<DT>,
diff --git a/src/utils/arrow.rs b/src/utils/arrow.rs
index 07d8a40..c01dd9b 100644
--- a/src/utils/arrow.rs
+++ b/src/utils/arrow.rs
@@ -33,7 +33,15 @@ fn get_cell_type<DT: CellType + Debug + DataType>(
     } else if cell.is_bool() {
         Ok(ArrowDataType::Boolean)
     } else if cell.is_datetime() {
-        Ok(ArrowDataType::Timestamp(TimeUnit::Millisecond, None))
+        cell.get_datetime()
+            .ok_or(anyhow!("could not get datetime value from cell: {cell:?}"))
+            .map(|excel_datetime| {
+                if excel_datetime.is_datetime() {
+                    ArrowDataType::Timestamp(TimeUnit::Millisecond, None)
+                } else {
+                    ArrowDataType::Duration(TimeUnit::Millisecond)
+                }
+            })
     }
     // These types contain an ISO8601 representation of a date/datetime or a durat
     else if cell.is_datetime_iso() {