diff --git a/skeletons/UTCTime.c b/skeletons/UTCTime.c
index 5ce2708..2ebf433 100644
--- a/skeletons/UTCTime.c
+++ b/skeletons/UTCTime.c
@@ -44,7 +44,7 @@
 	time_t tloc;
 
 	errno = EPERM;			/* Just an unlikely error code */
-	tloc = asn_UT2time(st, 0);
+	tloc = asn_UT2time(st, 0, 0);
 	if(tloc == -1 && errno != EPERM) {
 		_ASN_ERRLOG("%s: Invalid time format: %s",
 			td->name, strerror(errno));
@@ -68,11 +68,11 @@
 		int ret;
 
 		errno = EPERM;
-		if(asn_UT2time(st, &tm) == -1 && errno != EPERM)
+		if(asn_UT2time(st, &tm, 1) == -1 && errno != EPERM)
 			return cb("<bad-value>", 11, app_key);
 
 		ret = snprintf(buf, sizeof(buf),
-			"%04d-%02d-%02d %02d:%02d%02d",
+			"%04d-%02d-%02d %02d:%02d%02d (GMT)",
 			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
 			tm.tm_hour, tm.tm_min, tm.tm_sec);
 		assert(ret > 0 && ret < (int)sizeof(buf));
@@ -83,7 +83,7 @@
 }
 
 time_t
-asn_UT2time(const UTCTime_t *st, struct tm *_tm) {
+asn_UT2time(const UTCTime_t *st, struct tm *_tm, int as_gmt) {
 	char buf[17+2];	/* "AAMMJJhhmmss+hhmm" = 17, + 2 = 19 */
 	GeneralizedTime_t gt;
 
@@ -106,5 +106,20 @@
 		gt.buf[1] = 0x30;
 	}
 
-	return asn_GT2time(&gt, _tm);
+	return asn_GT2time(&gt, _tm, as_gmt);
 }
+
+UTCTime_t *
+asn_time2UT(UTCTime_t *opt_ut, const struct tm *tm, int force_gmt) {
+	GeneralizedTime_t *gt = (GeneralizedTime_t *)opt_ut;
+
+	gt = asn_time2GT(gt, tm, force_gmt);
+	if(gt == 0) return 0;
+
+	assert(gt->size >= 2);
+	gt->size -= 2;
+	memmove(gt->buf, gt->buf + 2, gt->size + 1);
+
+	return (UTCTime_t *)gt;
+}
+
diff --git a/skeletons/UTCTime.h b/skeletons/UTCTime.h
index 1e52388..d00dafb 100644
--- a/skeletons/UTCTime.h
+++ b/skeletons/UTCTime.h
@@ -19,8 +19,12 @@
  * Some handy helpers. *
  ***********************/
 
-/* On error returns -1 and errno set to EINVAL */
 struct tm;	/* <time.h> */
-time_t asn_UT2time(const UTCTime_t *, struct tm *_optional_tm4fill);
+
+/* See asn_GT2time() in GeneralizedTime.h */
+time_t asn_UT2time(const UTCTime_t *, struct tm *_optional_tm4fill, int as_gmt);
+
+/* See asn_time2GT() in GeneralizedTime.h */
+UTCTime_t *asn_time2UT(UTCTime_t *__opt_ut, const struct tm *, int force_gmt);
 
 #endif	/* _UTCTime_H_ */
diff --git a/skeletons/tests/check-UTCTime.c b/skeletons/tests/check-UTCTime.c
index 7522140..99ea4fe 100644
--- a/skeletons/tests/check-UTCTime.c
+++ b/skeletons/tests/check-UTCTime.c
@@ -5,7 +5,7 @@
 #include "../constraints.c"
 
 static void
-check(char *time_str, time_t sample) {
+check(char *time_str, time_t sample, int as_gmt) {
 	UTCTime_t gt;
 	struct tm tm;
 	time_t tloc;
@@ -13,7 +13,7 @@
 	gt.buf = time_str;
 	gt.size = strlen(time_str);
 
-	tloc = asn_UT2time(&gt, &tm);
+	tloc = asn_UT2time(&gt, &tm, as_gmt);
 	printf("[%s] -> %ld == %ld\n", time_str, (long)tloc, (long)sample);
 	if(tloc != -1)
 	printf("\t%d-%d-%dT%02d:%02d:%02d %ld\n",
@@ -26,29 +26,44 @@
 		tm.tm_gmtoff
 	);
 	assert(tloc == sample);
+
+	assert(tloc == -1 || as_gmt == 0 || tm.tm_gmtoff == 0);
+
+	if(as_gmt) check(time_str, sample, as_gmt);
 }
 
 int
 main(int ac, char **av) {
 
-	check("0401250", -1);
-	check("0401250930", -1);	/* "Z" or "(+|-)hhmm" required */
-	check("04012509300", -1);
-	check("040125093000-", -1);
-	check("040125093007-0", -1);
-	check("040125093007-080", -1);
-	check("0401250930.01Z", -1);
+	check("0401250", -1, 0);
+	check("0401250930", -1, 0);	/* "Z" or "(+|-)hhmm" required */
+	check("04012509300", -1, 0);
+	check("040125093000-", -1, 0);
+	check("040125093007-0", -1, 0);
+	check("040125093007-080", -1, 0);
+	check("0401250930.01Z", -1, 0);
 
-	check("040125093007Z", 1075023007);
-	check("040125093007+00", 1075023007);
-	check("040125093007-0800", 1075051807);
+	check("040125093007Z", 1075023007, 0);
+	check("040125093007+00", 1075023007, 0);
+	check("040125093007-0800", 1075051807, 0);
 
 	if(ac > 1) {
 		/* These will be valid only inside PST time zone */
-		check("040125093007", 1075051807);
-		check("040125093000,01", 1075051800);
-		check("040125093000,1234", 1075051800);
+		check("040125093007", 1075051807, 0);
+		check("040125093000,01", 1075051800, 0);
+		check("040125093000,1234", 1075051800, 0);
 	}
 
 	return 0;
 }
+
+
+/*
+ * Dummy function.
+ */
+
+der_enc_rval_t
+OCTET_STRING_encode_der(asn1_TYPE_descriptor_t *td, void *ptr, int tag_mode, ber_tlv_tag_t tag, asn_app_consume_bytes_f *cb, void *app_key) {
+	der_enc_rval_t erval;
+	return erval;
+}