diff --git a/time.ts b/time.ts
index 48b1b0e..8bbec8b 100644
--- a/time.ts
+++ b/time.ts
@@ -24,7 +24,7 @@ function twelveHour(twentyFourHour: string) {
 function dayOfWeek(iso: string) {
   const date = new Date(iso);
   const day = date.getDay();
-  const target = DAYS[day === 0 ? 0 : day - 1];
+  const target = DAYS[day];
   return target.slice(0, 3);
 }