-uschar * cp = store_get(32);
-struct tm * tp = gmtime(&t);
-size_t len = strftime(CS cp, 32, "%b %e %T %Y %Z", tp);
+uschar * cp;
+size_t len = 32;
+
+if (mod && Ustrcmp(mod, "int") == 0)
+ return string_sprintf("%u", (unsigned)t);
+
+cp = store_get(len);
+if (timestamps_utc)
+ {
+ uschar * tz = to_tz(US"GMT0");
+ len = strftime(CS cp, len, "%b %e %T %Y %Z", gmtime(&t));
+ restore_tz(tz);
+ }
+else
+ len = strftime(CS cp, len, "%b %e %T %Y %Z", localtime(&t));