diff --git a/src/lib/rtc.c b/src/lib/rtc.c
index 258f4ac25c..5e03cfae1e 100644
--- a/src/lib/rtc.c
+++ b/src/lib/rtc.c
@@ -22,9 +22,6 @@ static const char *const weekdays[] = {
 /* Zeller's rule */
 static int rtc_calc_weekday(struct rtc_time *tm)
 {
-	if (tm->year < 1971)
-		return -1;
-
 	/* In Zeller's rule, January and February are treated as if they
 	   are months 13 and 14 of the previous year (March is still month 3) */
 	const int zyear = ((tm->mon < 3) ? tm->year - 1 : tm->year);