diff --git a/ts/graphs/calendar.ts b/ts/graphs/calendar.ts
index c8823fe0b..49069b320 100644
--- a/ts/graphs/calendar.ts
+++ b/ts/graphs/calendar.ts
@@ -28,7 +28,7 @@ export interface GraphData {
     // indexed by day, where day is relative to today
     reviewCount: Map<number, number>;
     timeFunction: CountableTimeInterval;
-    weekdayLabels: string[];
+    weekdayLabels: number[];
 }
 
 interface DayDatum {
@@ -64,11 +64,9 @@ export function gatherData(data: pb.BackendProto.GraphsOut): GraphData {
             ? timeSaturday
             : timeSunday;
 
-    const weekdayLabels = ["S", "M", "T", "W", "T", "F", "S"];
-
-    for (let i = 0; i < data.firstWeekday; i++) {
-        const shifted = weekdayLabels.shift() as string;
-        weekdayLabels.push(shifted);
+    const weekdayLabels: number[] = [];
+    for (let i = 0; i < 7; i++) {
+        weekdayLabels.push((data.firstWeekday + i) % 7);
     }
 
     return { reviewCount, timeFunction, weekdayLabels };
@@ -168,7 +166,7 @@ export function renderCalendar(
         .selectAll("text")
         .data(sourceData.weekdayLabels)
         .join("text")
-        .text((d) => d)
+        .text((d: number) => i18n.weekdayLabel(d))
         .attr("width", x(-1)! - 2)
         .attr("height", height - 2)
         .attr("x", x(1)! - 3)
diff --git a/ts/lib/i18n.ts b/ts/lib/i18n.ts
index 443c9c687..7210196ed 100644
--- a/ts/lib/i18n.ts
+++ b/ts/lib/i18n.ts
@@ -59,6 +59,13 @@ export class I18n {
         }
     }
 
+    weekdayLabel(n: number): string {
+        const firstLang = this.bundles[0].locales[0];
+        return new Date(86_400_000 * (3 + n)).toLocaleDateString(firstLang, {
+            weekday: "narrow",
+        });
+    }
+
     private keyName(msg: pb.FluentProto.FluentString): string {
         return this.TR[msg].toLowerCase().replace(/_/g, "-");
     }