diff --git a/imag-timetrack/src/start.rs b/imag-timetrack/src/start.rs
index 13b1f3e8..8518f566 100644
--- a/imag-timetrack/src/start.rs
+++ b/imag-timetrack/src/start.rs
@@ -29,14 +29,16 @@ pub fn start(rt: &Runtime) -> i32 {
     let (_, cmd) = rt.cli().subcommand();
     let cmd = cmd.unwrap(); // checked in main()
 
-    let start = match cmd.value_of("start-time").map(::chrono::naive::NaiveDateTime::from_str) {
-        None          => ::chrono::offset::Local::now().naive_local(),
-        Some(Ok(ndt)) => ndt,
-        Some(Err(e))  => {
-            trace_error(&e);
-            error!("Cannot continue, not having start time");
-            return 1
-        },
+    let start = match cmd.value_of("start-time") {
+        None | Some("now") => ::chrono::offset::Local::now().naive_local(),
+        Some(ndt)          => match ::chrono::naive::NaiveDateTime::from_str(ndt) {
+            Ok(ndt) => ndt,
+            Err(e) =>  {
+                trace_error(&e);
+                error!("Cannot continue, not having start time");
+                return 1
+            },
+        }
     };
 
     cmd.values_of("tags")
diff --git a/imag-timetrack/src/stop.rs b/imag-timetrack/src/stop.rs
index c1c5e682..29b03a02 100644
--- a/imag-timetrack/src/stop.rs
+++ b/imag-timetrack/src/stop.rs
@@ -37,16 +37,19 @@ pub fn stop(rt: &Runtime) -> i32 {
     let (_, cmd) = rt.cli().subcommand();
     let cmd = cmd.unwrap(); // checked in main()
 
-    let stop_time = match cmd.value_of("stop-time").map(::chrono::naive::NaiveDateTime::from_str) {
-        None          => ::chrono::offset::Local::now().naive_local(),
-        Some(Ok(ndt)) => ndt,
-        Some(Err(e))  => {
-            trace_error(&e);
-            error!("Cannot continue, not having stop time");
-            return 1
-        },
+    let stop_time = match cmd.value_of("stop-time") {
+        None | Some("now") => ::chrono::offset::Local::now().naive_local(),
+        Some(ndt)          => match ::chrono::naive::NaiveDateTime::from_str(ndt) {
+            Ok(ndt) => ndt,
+            Err(e) =>  {
+                trace_error(&e);
+                error!("Cannot continue, not having start time");
+                return 1
+            },
+        }
     };
 
+
     // TODO: We do not yet support stopping all tags by simply calling the "stop" subcommand!
 
     let tags : Vec<TimeTrackingTag> = cmd.values_of("tags")
diff --git a/imag-timetrack/src/ui.rs b/imag-timetrack/src/ui.rs
index f394057d..a27c4ced 100644
--- a/imag-timetrack/src/ui.rs
+++ b/imag-timetrack/src/ui.rs
@@ -25,8 +25,8 @@ pub fn build_ui<'a>(app: App<'a, 'a>) -> App<'a, 'a> {
                    .version("0.1")
                    .arg(Arg::with_name("start-time")
                         .index(1)
-                        .required(false)
-                        .help("Start-time when to start the timetracking"))
+                        .required(true)
+                        .help("Start-time when to start the timetracking (use 'now' for current time)"))
                    .arg(Arg::with_name("tags")
                         .index(2)
                         .required(true)
@@ -39,8 +39,8 @@ pub fn build_ui<'a>(app: App<'a, 'a>) -> App<'a, 'a> {
                    .version("0.1")
                    .arg(Arg::with_name("end-time")
                         .index(1)
-                        .required(false)
-                        .help("End-time when to stop the timetracking"))
+                        .required(true)
+                        .help("End-time when to stop the timetracking (use 'now' for current time)"))
                    .arg(Arg::with_name("tags")
                         .index(2)
                         .required(true)