diff --git a/frontend/src/pages/CalendarPage.jsx b/frontend/src/pages/CalendarPage.jsx
index 8a90aea..c2bd38a 100644
--- a/frontend/src/pages/CalendarPage.jsx
+++ b/frontend/src/pages/CalendarPage.jsx
@@ -85,6 +85,8 @@ const DAYS_IN_MONTH = [
 
 ];
 
+const WEEKDAY_INITIALS = ['D', 'L', 'M', 'M', 'J', 'V', 'S'];
+
 const HEADER_HEIGHT = 35;
 
 const DAY_COLUMN_WIDTH = 45;
@@ -1539,6 +1541,16 @@ const CalendarPage = () => {
                                   monthIndex,
                                   day,
                                 );
+                              const cellDayNumber =
+                                Math.floor(
+                                  Date.UTC(getMonthYear(monthIndex), monthIndex, day) / 86400000,
+                                );
+                              const alternateWeek =
+                                Math.floor((cellDayNumber + 3) / 7) % 2 !== 0;
+                              const weekdayInitial =
+                                WEEKDAY_INITIALS[
+                                  new Date(Date.UTC(getMonthYear(monthIndex), monthIndex, day)).getUTCDay()
+                                ];
                               const selectedCell =
                                 isDateSelected(cellDate);
                               const dayEvents =
@@ -1578,15 +1590,10 @@ const CalendarPage = () => {
                                     border-border
                                     ${dayIndex < rowCount - 1 ? 'border-b' : ''}
                                     ${monthIndex !== displayedMonthIndices[displayedMonthIndices.length - 1] ? 'border-r' : ''}
-                                    bg-card
+                                    ${todayCell ? 'bg-muted' : alternateWeek ? 'bg-muted/40' : 'bg-card'}
                                     px-2
                                     transition-colors
                                     hover:bg-muted/40
-                                    ${
-                                      todayCell
-                                        ? 'bg-muted'
-                                        : ''
-                                    }
                                     ${
                                       selectedCell
                                         ? 'bg-primary/15 ring-1 ring-inset ring-primary/40'
@@ -1636,9 +1643,17 @@ const CalendarPage = () => {
                                         text-primary-foreground
                                       "
                                     >
-                                      {day}
+                                      {weekdayInitial}
                                     </div>
                                   )}
+                                  {!todayCell && (
+                                    <span
+                                      aria-hidden="true"
+                                      className="pointer-events-none absolute inset-0 flex items-center justify-center text-[10px] font-normal text-muted-foreground/30"
+                                    >
+                                      {weekdayInitial}
+                                    </span>
+                                  )}
                                   {/* ==================================================
                                       ÉVÉNEMENTS SUR UNE PÉRIODE
                                       ================================================== */}