diff --git a/easyrsa3/easyrsa b/easyrsa3/easyrsa
index 3efd4b5..c34257e 100755
--- a/easyrsa3/easyrsa
+++ b/easyrsa3/easyrsa
@@ -3099,7 +3099,7 @@ offset_days_to_cert_date() {
 
 	# Darwin, BSD
 	elif cert_type_date="$(
-		date -u -j -v "+${offset}days" "+%b %d %H:%M:%S %Y %Z" \
+		date -u -j -v "+${offset}d" "+%b %d %H:%M:%S %Y %Z" \
 			2>/dev/null
 		)"
 	then return