diff --git a/src/main.rs b/src/main.rs
index 75c0303..6c44a19 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,9 @@
 //! Simple calendar applications.
 mod ui;
+mod model;
+
 use ui::calendar;
+use model::events::EventsCollection;
 
 use chrono::{Datelike, NaiveDate, Months, Utc};
 use calendar::{CalendarMonthView, CalendarYearView, CalendarParams };
@@ -27,6 +30,7 @@ pub fn main() -> iced::Result {
 struct CalendarApp {
     month: NaiveDate,
     controls: Controls,
+    events: EventsCollection,
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -119,6 +123,7 @@ impl Application for CalendarApp {
         let month = Utc::today().naive_local();
         (CalendarApp {
             month,
+            events: EventsCollection::new(),
             ..CalendarApp::default()
         }, Command::none())
     }
@@ -163,7 +168,7 @@ impl Application for CalendarApp {
             ;
 
         match self.controls.mode {
-            Some(ViewMode::Year) => content = content.push(CalendarYearView::new(&CalendarParams::new(), self.month)),
+            Some(ViewMode::Year) => content = content.push(CalendarYearView::new(&CalendarParams::new(), self.month, &self.events)),
             Some(ViewMode::Month) | None => content = content.push(CalendarMonthView::new(&CalendarParams::new(), self.month)),
         };
 
diff --git a/src/model.rs b/src/model.rs
new file mode 100644
index 0000000..6226263
--- /dev/null
+++ b/src/model.rs
@@ -0,0 +1 @@
+pub mod events;
\ No newline at end of file
diff --git a/src/model/events.rs b/src/model/events.rs
new file mode 100644
index 0000000..e9d0eaf
--- /dev/null
+++ b/src/model/events.rs
@@ -0,0 +1,51 @@
+use chrono::NaiveDate;
+use std::vec::Vec;
+use std::default::Default;
+
+pub struct Event {
+    begin: NaiveDate,
+    end: NaiveDate,
+}
+
+impl Event {
+    fn is_in_day(&self, day: NaiveDate) -> bool {
+        day >= self.begin && day <= self.end
+    }
+}
+
+pub struct EventsCollection {
+    events: Vec<Event>,
+}
+
+impl EventsCollection {
+    pub fn new() -> Self {
+        EventsCollection {
+            // TODO: hard-coded events
+            events: vec![
+            Event {
+                begin: NaiveDate::from_ymd_opt(2023, 01, 15).unwrap(),
+                end: NaiveDate::from_ymd_opt(2023, 01, 16).unwrap(),
+            },
+            Event {
+                begin: NaiveDate::from_ymd_opt(2023, 01, 16).unwrap(),
+                end: NaiveDate::from_ymd_opt(2023, 01, 17).unwrap(),
+            },
+            ],
+        }
+    }
+
+    pub fn is_any_in_day(&self, day: NaiveDate) -> bool {
+        for ev_day in &self.events {
+            if ev_day.is_in_day(day) {
+                return true;
+            }
+        }
+        false
+    }
+}
+
+impl Default for EventsCollection {
+    fn default() -> EventsCollection {
+        EventsCollection::new()
+    }
+}
\ No newline at end of file
diff --git a/src/ui/calendar.rs b/src/ui/calendar.rs
index 5ede437..6b4e142 100644
--- a/src/ui/calendar.rs
+++ b/src/ui/calendar.rs
@@ -16,6 +16,7 @@ use iced_native::alignment;
 use iced_native::widget::Tree;
 use chrono::{NaiveDate, Datelike, Duration, Local};
 use super::basics::CellGrid;
+use crate::model::events::{Event, EventsCollection};
 
 const MONTH_NAMES: [&str;12] = [
     "gen",
@@ -46,6 +47,8 @@ pub struct CalendarParams {
     day_weekend_bg: Color,
     day_today_bg: Color,
     day_text_margin: f32,
+
+    ev_bg: Color,
 }
 
 impl CalendarParams {
@@ -59,6 +62,7 @@ impl CalendarParams {
             day_other_month_fg: Color::from_rgb8(220, 220, 220),
             day_weekend_bg: Color::from_rgb8(245, 245, 245),
             day_text_margin: 5.0,
+            ev_bg: Color::from_rgb8(100, 100, 245)
         }
     }
 }
@@ -350,16 +354,17 @@ where
 
 //-------------------------------------------------------------------------
 
-pub struct CalendarYearView {
+pub struct CalendarYearView<'a> {
     first_day: NaiveDate,
     first_day_in_view: NaiveDate,
     params: CalendarParams,
     month_column_font_size: f32,
     margin: f32,
+    events: &'a EventsCollection,
 }
 
-impl CalendarYearView {
-    pub fn new(params: &CalendarParams, day: NaiveDate) -> Self {
+impl<'a> CalendarYearView<'a> {
+    pub fn new(params: &CalendarParams, day: NaiveDate, events: &'a EventsCollection) -> Self {
         // first day of the year
         let first_day = NaiveDate::from_ymd(day.year(), 1, 1);
 
@@ -374,7 +379,8 @@ impl CalendarYearView {
             first_day_in_view,
             params: params.clone(),
             month_column_font_size: 24.0,
-            margin: 10.0
+            margin: 10.0,
+            events
         }
     }
 
@@ -537,6 +543,8 @@ impl CalendarYearView {
                     self.params.day_today_bg
                 } else if weekday > 4 {
                     self.params.day_weekend_bg
+                } else if self.events.is_any_in_day(current_day) {
+                    self.params.ev_bg
                 } else {
                     Color::TRANSPARENT
                 };
@@ -580,7 +588,7 @@ impl CalendarYearView {
 
 } // CalendarYearView
 
-impl<Message, Renderer> Widget<Message, Renderer> for CalendarYearView
+impl<Message, Renderer> Widget<Message, Renderer> for CalendarYearView<'_>
 where
     Renderer: text::Renderer,
 {
@@ -646,11 +654,11 @@ where
     }
 }
 
-impl<'a, Message, Renderer> From<CalendarYearView> for Element<'a, Message, Renderer>
+impl<'a, Message, Renderer> From<CalendarYearView<'a>> for Element<'a, Message, Renderer>
 where
     Renderer: text::Renderer,
 {
-    fn from(year_view: CalendarYearView) -> Self {
+    fn from(year_view: CalendarYearView<'a>) -> Self {
         Self::new(year_view)
     }
 }