1 files changed, 1 insertions, 1 deletions

diff --git a/firmware/common/timefuncs.c b/firmware/common/timefuncs.c
index e682454ce2..9d56126b17 100644
--- a/firmware/common/timefuncs.c
+++ b/firmware/common/timefuncs.c
@@ -34,7 +34,7 @@ bool valid_time(struct tm *tm)
         tm->tm_min < 0 || tm->tm_min > 59 ||
         tm->tm_year < 100 || tm->tm_year > 199 ||
         tm->tm_mon < 0 || tm->tm_mon > 11 ||
-        tm->tm_wday < 1 || tm->tm_wday > 7 ||
+        tm->tm_wday < 0 || tm->tm_wday > 6 ||
         tm->tm_mday < 1 || tm->tm_mday > 31)
         return false;
     else