1 files changed, 5 insertions, 2 deletions

diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index e9a8794bc3ab..9fa2e0824708 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -95,8 +95,11 @@ static inline void localtime_2(struct xtm *r, time_t time)
          */
         r->dse = time / 86400;
 
-        /* 1970-01-01 (w=0) was a Thursday (4). */
-        r->weekday = (4 + r->dse) % 7;
+        /*
+         * 1970-01-01 (w=0) was a Thursday (4).
+         * -1 and +1 map Sunday properly onto 7.
+         */
+        r->weekday = (4 + r->dse - 1) % 7 + 1;
 }
 
 static void localtime_3(struct xtm *r, time_t time)