diff --git a/src/uu/dmesg/src/dmesg.rs b/src/uu/dmesg/src/dmesg.rs
index 58c4d57..5392e67 100644
--- a/src/uu/dmesg/src/dmesg.rs
+++ b/src/uu/dmesg/src/dmesg.rs
@@ -27,6 +27,22 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     if matches.get_flag(options::JSON) {
         dmesg.output_format = OutputFormat::Json;
     }
+    if let Some(time_format) = matches.get_one::<String>(options::TIME_FORMAT) {
+        match &time_format[..] {
+            "delta" => dmesg.time_format = TimeFormat::Delta,
+            "reltime" => dmesg.time_format = TimeFormat::Reltime,
+            "ctime" => dmesg.time_format = TimeFormat::Ctime,
+            "notime" => dmesg.time_format = TimeFormat::Notime,
+            "iso" => dmesg.time_format = TimeFormat::Iso,
+            "raw" => dmesg.time_format = TimeFormat::Raw,
+            _ => {
+                return Err(USimpleError::new(
+                    1,
+                    format!("unknown time format: {time_format}"),
+                ))
+            }
+        }
+    }
     dmesg.parse()?.print();
     Ok(())
 }
@@ -159,6 +175,7 @@ enum TimeFormat {
     Delta,
     Reltime,
     Ctime,
+    Notime,
     Iso,
     Raw,
 }