diff --git a/src/webpage.rs b/src/webpage.rs
index 33e0f59..deeb41b 100644
--- a/src/webpage.rs
+++ b/src/webpage.rs
@@ -1,7 +1,9 @@
 use crate::localize_day;
-use crate::session::{DatedSession, RegularSession, Session, WithNote};
+use crate::session::{
+  AlterException, CancelException, DatedSession, ExtraSession, RegularSession, Session, WithNote,
+};
 use crate::session_date_calculator::{Day, DayIter, NthWeekday};
-use chrono::Weekday;
+use chrono::{Datelike, Days, Months, NaiveDate, Weekday};
 use leptos::prelude::*;
 use leptos::server_fn::request::browser::Request;
 use serde::{Deserialize, Serialize};
@@ -80,52 +82,54 @@ fn Sessions(config: SessionConfig) -> impl IntoView {
 #[component]
 fn DatedSession(session: DatedSession) -> impl IntoView {
   match session {
-    DatedSession::Regular { session, day, .. } => {
-      view! {
-        <div class="box elem-background">
-          <p class="small-text">"<Regulärer Termin>"</p>
-          <p><b>{localize_day(&day)}</b></p>
-          <p>{session.note}</p>
-        </div>
-      }.into_any()
+    DatedSession::Regular { session, day, .. } => view! {
+      <div class="box elem-background">
+        <p class="small-text">"<Regulärer Termin>"</p>
+        <p><b>{localize_day(&day)}</b></p>
+        <p>{session.note}</p>
+      </div>
     }
-    DatedSession::Extra(session) => {
-      view! {
-        <div class="box highlighted-background">
-          <p class="small-text">"<Extra Probe>"</p>
-          <p><b>{localize_day(&session.date.into())}</b></p>
-          <p>{session.note}</p>
-        </div>
-      }.into_any()
+    .into_any(),
+    DatedSession::Extra(session) => view! {
+      <div class="box highlight-background">
+        <p class="small-text">"<Extra Probe>"</p>
+        <p><b>{localize_day(&session.date.into())}</b></p>
+        <p>{session.note}</p>
+      </div>
     }
-    DatedSession::Cancelled { session, day, .. } => {
-      view! {
-        <div class="box cancel-background">
-          <p class="small-text">"<Entfall>"</p>
-          <p class="strikethrough bold">{localize_day(&day)}</p>
-          <p>{session.note}</p>
-        </div>
-      }.into_any()
+    .into_any(),
+    DatedSession::Cancelled { session, day, .. } => view! {
+      <div class="box cancel-background">
+        <p class="small-text">"<Entfall>"</p>
+        <p class="strikethrough bold">{localize_day(&day)}</p>
+        <p>{session.note}</p>
+      </div>
     }
-    DatedSession::Altered { session, day, exception, .. } => {
-      let day = move || {
-        match exception.date.map(Day::from) {
-          None => view! { {localize_day(&day)} }.into_any(),
-          Some(new_day) => view! {
-            <span class="strikethrough">{localize_day(&day)}</span>
-            " "
-            {localize_day(&new_day)}
-          }.into_any(),
+    .into_any(),
+    DatedSession::Altered {
+      session,
+      day,
+      exception,
+      ..
+    } => {
+      let day = move || match exception.date.map(Day::from) {
+        None => view! { {localize_day(&day)} }.into_any(),
+        Some(new_day) => view! {
+          <span class="strikethrough">{localize_day(&day)}</span>
+          " "
+          {localize_day(&new_day)}
         }
+        .into_any(),
       };
-      
+
       view! {
         <div class="box change-background">
           <p class="small-text">"<Änderung>"</p>
           <p class="bold">{day}</p>
           <p>{exception.note.or(session.note)}</p>
         </div>
-      }.into_any()
+      }
+      .into_any()
     }
   }
 }
@@ -160,13 +164,56 @@ pub struct SessionConfig {
   pub sessions: Vec<Session>,
 }
 
+macro_rules! date {
+  ($day: expr, $mon: expr, $year: expr) => {
+    NaiveDate::from_ymd_opt($year, $mon, $day).expect("valid date")
+  };
+}
+
 impl Default for SessionConfig {
+  #[allow(clippy::zero_prefixed_literal)]
   fn default() -> Self {
+    const YEAR: i32 = 2024;
+    const NEXT_TUE_SESSION: NaiveDate = date!(18, 02, YEAR);
+    const NEXT_SUN_SESSION: NaiveDate = date!(02, 03, YEAR);
+    let next_next_sun_session = {
+      let some_day_next_month = NEXT_SUN_SESSION.checked_add_months(Months::new(1)).unwrap();
+      NaiveDate::from_weekday_of_month_opt(
+        some_day_next_month.year(),
+        some_day_next_month.month(),
+        Weekday::Sun,
+        1,
+      )
+      .unwrap()
+    };
+
     Self {
-      motd: Some("Jeder 1. Sonntag und 3. Dienstag im Monat".to_string()),
+      motd: Some("Jeder 1. Sonntag und 3. Dienstag im Monat".into()),
       sessions: vec![
-        RegularSession::from(NthWeekday::new(1, Weekday::Sun)).with_note("10:00 Uhr").into(),
-        RegularSession::from(NthWeekday::new(3, Weekday::Tue)).with_note("18:30 Uhr").into(),
+        RegularSession::from(NthWeekday::new(1, Weekday::Sun))
+          .with_note("10:00 Uhr")
+          .with_exception(
+            NEXT_SUN_SESSION,
+            AlterException {
+              date: Some(NEXT_SUN_SESSION.checked_sub_days(Days::new(1)).unwrap()),
+              ..Default::default()
+            },
+          )
+          .with_exception(
+            next_next_sun_session,
+            AlterException {
+              note: Some("11 Uhr".into()),
+              ..Default::default()
+            },
+          )
+          .into(),
+        RegularSession::from(NthWeekday::new(3, Weekday::Tue))
+          .with_note("18:30 Uhr")
+          .with_exception(NEXT_TUE_SESSION, CancelException::default())
+          .into(),
+        ExtraSession::from(NEXT_TUE_SESSION.checked_add_days(Days::new(2)).unwrap())
+          .with_note("18 Uhr")
+          .into(),
       ],
     }
   }