diff --git a/src/datatype.rs b/src/datatype.rs
index 9336c448..fd1ba7ba 100644
--- a/src/datatype.rs
+++ b/src/datatype.rs
@@ -59,6 +59,26 @@ impl DataTypeTrait for DataType {
         matches!(*self, DataType::String(_))
     }
 
+    #[cfg(feature = "dates")]
+    fn is_duration(&self) -> bool {
+        matches!(*self, DataType::Duration(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_duration_iso(&self) -> bool {
+        matches!(*self, DataType::DurationIso(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_datetime(&self) -> bool {
+        matches!(*self, DataType::DateTime(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_datetime_iso(&self) -> bool {
+        matches!(*self, DataType::DateTimeIso(_))
+    }
+
     fn get_int(&self) -> Option<i64> {
         if let DataType::Int(v) = self {
             Some(*v)
@@ -398,6 +418,26 @@ impl DataTypeTrait for DataTypeRef<'_> {
         matches!(*self, DataTypeRef::String(_) | DataTypeRef::SharedString(_))
     }
 
+    #[cfg(feature = "dates")]
+    fn is_duration(&self) -> bool {
+        matches!(*self, DataTypeRef::Duration(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_duration_iso(&self) -> bool {
+        matches!(*self, DataTypeRef::DurationIso(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_datetime(&self) -> bool {
+        matches!(*self, DataTypeRef::DateTime(_))
+    }
+
+    #[cfg(feature = "dates")]
+    fn is_datetime_iso(&self) -> bool {
+        matches!(*self, DataTypeRef::DateTimeIso(_))
+    }
+
     fn get_int(&self) -> Option<i64> {
         if let DataTypeRef::Int(v) = self {
             Some(*v)
@@ -553,6 +593,22 @@ pub trait DataTypeTrait {
     /// Assess if datatype is a string
     fn is_string(&self) -> bool;
 
+    /// Assess if datatype is a duration
+    #[cfg(feature = "dates")]
+    fn is_duration(&self) -> bool;
+
+    /// Assess if datatype is an ISO8601 duration
+    #[cfg(feature = "dates")]
+    fn is_duration_iso(&self) -> bool;
+
+    /// Assess if datatype is a datetime
+    #[cfg(feature = "dates")]
+    fn is_datetime(&self) -> bool;
+
+    /// Assess if datatype is an ISO8601 datetime
+    #[cfg(feature = "dates")]
+    fn is_datetime_iso(&self) -> bool;
+
     /// Try getting int value
     fn get_int(&self) -> Option<i64>;
 
diff --git a/tests/test.rs b/tests/test.rs
index 5f317f23..446098e0 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -2,7 +2,8 @@ use calamine::DataType::{
     Bool, DateTime, DateTimeIso, Duration, DurationIso, Empty, Error, Float, String,
 };
 use calamine::{
-    open_workbook, open_workbook_auto, Ods, Reader, Sheet, SheetType, SheetVisible, Xls, Xlsb, Xlsx,
+    open_workbook, open_workbook_auto, DataTypeTrait, Ods, Reader, Sheet, SheetType, SheetVisible,
+    Xls, Xlsb, Xlsx,
 };
 use calamine::{CellErrorType::*, DataType};
 use std::io::Cursor;