diff --git a/utils/commands/diary.ts b/utils/commands/diary.ts
index e1827d7..cd1f1a9 100644
--- a/utils/commands/diary.ts
+++ b/utils/commands/diary.ts
@@ -52,7 +52,7 @@ export async function diaryCommand(
         const formatted = formatResponse(expense);
         return {
           success: true,
-          message: `Added expense: ${formatted.description} (${formatted.cost.toFixed(2)}€) in category ${formatted.category} for ${formatted.createdAt.toLocaleDateString()}`,
+          message: `Added expense: ${formatted.description} (${formatted.cost.toFixed(2)}€) in category ${formatted.category} for ${formatted.createdAt.toLocaleDateString('en-GB')}`,
           data: formatted
         };
       }
@@ -108,7 +108,7 @@ export async function diaryCommand(
           await reporter.sendReport(from, to, includeJson);
 
           const formatDate = (date: Date) =>
-            date.toLocaleDateString('en-US', {
+            date.toLocaleDateString('en-GB', {
               year: 'numeric',
               month: 'long',
               day: 'numeric'
diff --git a/utils/commands/helpers/dayLog.ts b/utils/commands/helpers/dayLog.ts
index 678c96d..96f34de 100644
--- a/utils/commands/helpers/dayLog.ts
+++ b/utils/commands/helpers/dayLog.ts
@@ -41,7 +41,7 @@ export async function processDayLog(
 
       return {
         success: true,
-        message: `Added comment to existing log for ${normalizedDate.toLocaleDateString()}`,
+        message: `Added comment to existing log for ${normalizedDate.toLocaleDateString('en-GB')}`,
         data: updatedLog
       };
     } else {
@@ -54,7 +54,7 @@ export async function processDayLog(
 
       return {
         success: true,
-        message: `Created new log for ${normalizedDate.toLocaleDateString()}`,
+        message: `Created new log for ${normalizedDate.toLocaleDateString('en-GB')}`,
         data: newLog
       };
     }
diff --git a/utils/commands/report.ts b/utils/commands/report.ts
index 7abab64..c4d1b79 100644
--- a/utils/commands/report.ts
+++ b/utils/commands/report.ts
@@ -114,14 +114,14 @@ export class ExpenseReporter {
     dayLogs: ReportDayLogsData
   ): string {
     const formatDate = (date: Date) =>
-      date.toLocaleDateString('en-US', {
+      date.toLocaleDateString('en-GB', {
         year: 'numeric',
         month: 'long',
         day: 'numeric'
       });
 
     const formatCurrency = (amount: number) =>
-      amount.toLocaleString('en-US', {
+      amount.toLocaleString('en-GB', {
         style: 'currency',
         currency: 'EUR'
       });
@@ -279,7 +279,7 @@ export class ExpenseReporter {
       const response = await this.resend.emails.send({
         from: this.senderEmail,
         to: this.recipientEmail,
-        subject: `Diary Report: ${from.toLocaleDateString()} - ${to.toLocaleDateString()}`,
+        subject: `Diary Report: ${from.toLocaleDateString('en-GB')} - ${to.toLocaleDateString('en-GB')}`,
         html: htmlContent,
         attachments
       });