Index: ext/date/php_date.c
===================================================================
--- ext/date/php_date.c	(revision 288025)
+++ ext/date/php_date.c	(working copy)
@@ -996,7 +996,7 @@
 {
 	smart_str            string = {0};
 	int                  i, length;
-	char                 buffer[33];
+	char                 buffer[53];
 	timelib_time_offset *offset = NULL;
 	timelib_sll          isoweek, isoyear;
 	int                  rfc_colon;
@@ -1111,7 +1111,7 @@
 			case 'Z': length = slprintf(buffer, 32, "%d", localtime ? offset->offset : 0); break;
 
 			/* full date/time */
-			case 'c': length = slprintf(buffer, 32, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
+			case 'c': length = slprintf(buffer, 46, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
 							                (int) t->y, (int) t->m, (int) t->d,
 											(int) t->h, (int) t->i, (int) t->s,
 											localtime ? ((offset->offset < 0) ? '-' : '+') : '+',
@@ -1119,7 +1119,7 @@
 											localtime ? abs((offset->offset % 3600) / 60) : 0
 							  );
 					  break;
-			case 'r': length = slprintf(buffer, 32, "%3s, %02d %3s %04d %02d:%02d:%02d %c%02d%02d",
+			case 'r': length = slprintf(buffer, 52, "%3s, %02d %3s %04d %02d:%02d:%02d %c%02d%02d",
 							                php_date_short_day_name(t->y, t->m, t->d),
 											(int) t->d, mon_short_names[t->m - 1],
 											(int) t->y, (int) t->h, (int) t->i, (int) t->s,