diff --git a/packages/taler-wallet-webextension/src/components/TransactionItem.tsx b/packages/taler-wallet-webextension/src/components/TransactionItem.tsx
index b59d6fad1..840b01308 100644
--- a/packages/taler-wallet-webextension/src/components/TransactionItem.tsx
+++ b/packages/taler-wallet-webextension/src/components/TransactionItem.tsx
@@ -202,7 +202,7 @@ function TransactionLayout(props: TransactionLayoutProps): VNode {
           </LightText>
         )}
         <SmallLightText style={{ marginTop: 5 }}>
-          <Time timestamp={props.timestamp} format="hh:mm" />
+          <Time timestamp={props.timestamp} format="HH:mm" />
         </SmallLightText>
       </Column>
       <TransactionAmount
diff --git a/packages/taler-wallet-webextension/src/wallet/DeveloperPage.tsx b/packages/taler-wallet-webextension/src/wallet/DeveloperPage.tsx
index 3406b04ef..c6f016e00 100644
--- a/packages/taler-wallet-webextension/src/wallet/DeveloperPage.tsx
+++ b/packages/taler-wallet-webextension/src/wallet/DeveloperPage.tsx
@@ -288,7 +288,7 @@ export function View({
                     {o.type}{" "}
                     <Time
                       timestamp={o.timestampDue}
-                      format="yy/MM/dd hh:mm:ss"
+                      format="yy/MM/dd HH:mm:ss"
                     />
                   </dt>
                   <dd>