diff --git a/src/parser/timestamp.rs b/src/parser/timestamp.rs
index 821933d..33d0122 100644
--- a/src/parser/timestamp.rs
+++ b/src/parser/timestamp.rs
@@ -82,8 +82,20 @@ fn active_timestamp<'r, 's>(
 ) -> Res<&'s str, Timestamp<'s>> {
     let (remaining, _) = tag("<")(input)?;
     let (remaining, _date) = date(context, remaining)?;
-    not_yet_implemented()?;
-    todo!()
+    let (remaining, _time) =
+        opt(tuple((space1, parser_with_context!(active_time)(context))))(remaining)?;
+    let (remaining, _repeater) =
+        opt(tuple((space1, parser_with_context!(repeater)(context))))(remaining)?;
+    let (remaining, _warning_delay) = opt(tuple((
+        space1,
+        parser_with_context!(warning_delay)(context),
+    )))(remaining)?;
+    let (remaining, _) = tag(">")(remaining)?;
+
+    let (remaining, _) = space0(remaining)?;
+    let source = get_consumed(input, remaining);
+
+    Ok((remaining, Timestamp { source }))
 }
 
 #[tracing::instrument(ret, level = "debug")]
@@ -170,3 +182,67 @@ fn dayname_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str,
         c.is_whitespace() || "+-]>0123456789\n".contains(*c)
     }))(input)
 }
+
+#[tracing::instrument(ret, level = "debug")]
+fn active_time<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    let (remaining, _hour) =
+        verify(digit1, |hour: &str| hour.len() >= 1 && hour.len() <= 2)(input)?;
+    let (remaining, _) = tag(":")(remaining)?;
+    let (remaining, _minute) = verify(digit1, |minute: &str| minute.len() == 2)(remaining)?;
+    let (remaining, _time_rest) = opt(parser_with_context!(active_time_rest)(context))(remaining)?;
+    let source = get_consumed(input, remaining);
+    Ok((remaining, source))
+}
+
+#[tracing::instrument(ret, level = "debug")]
+fn active_time_rest<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    let parser_context =
+        context.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
+            class: ExitClass::Beta,
+            exit_matcher: &active_time_rest_end,
+        }));
+
+    let (remaining, body) = recognize(verify(
+        many_till(
+            anychar,
+            parser_with_context!(exit_matcher_parser)(&parser_context),
+        ),
+        |(body, _end_contents)| !body.is_empty(),
+    ))(input)?;
+
+    Ok((remaining, body))
+}
+
+#[tracing::instrument(ret, level = "debug")]
+fn active_time_rest_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    alt((
+        recognize(verify(anychar, |c| ">\n".contains(*c))),
+        parser_with_context!(repeater)(context),
+        parser_with_context!(warning_delay)(context),
+    ))(input)
+}
+
+#[tracing::instrument(ret, level = "debug")]
+fn repeater<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    // + for cumulative type
+    // ++ for catch-up type
+    // .+ for restart type
+    let (remaining, _mark) = alt((tag("++"), tag("+"), tag(".+")))(input)?;
+    let (remaining, _value) = digit1(remaining)?;
+    // h = hour, d = day, w = week, m = month, y = year
+    let (remaining, _unit) = recognize(one_of("hdwmy"))(remaining)?;
+    let source = get_consumed(input, remaining);
+    Ok((remaining, source))
+}
+
+#[tracing::instrument(ret, level = "debug")]
+fn warning_delay<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
+    // - for all type
+    // -- for first type
+    let (remaining, _mark) = alt((tag("--"), tag("-")))(input)?;
+    let (remaining, _value) = digit1(remaining)?;
+    // h = hour, d = day, w = week, m = month, y = year
+    let (remaining, _unit) = recognize(one_of("hdwmy"))(remaining)?;
+    let source = get_consumed(input, remaining);
+    Ok((remaining, source))
+}