We can use i18n directly

src/main.cpp

@@ -43,7 +43,7 @@ int main(int argc, char* argv[])
                          QStringLiteral(KALARM_FULL_VERSION),
                          i18n("Personal alarm message, command and email scheduler by KDE"),
                          KAboutLicense::GPL,
-                         ki18n("Copyright © 2001-%1, David Jarvie").subs(QStringLiteral("2022")).toString(), QString());
+                         i18n("Copyright © 2001-%1, David Jarvie", QStringLiteral("2022")), QString());
     aboutData.addAuthor(i18n("David Jarvie"), i18n("Author"), QStringLiteral("djarvie@kde.org"));
     aboutData.setOrganizationDomain("kde.org");
     aboutData.setDesktopFileName(QStringLiteral(KALARM_DBUS_SERVICE));