fix offset to not need system timezone

broker/ntgvision.go

@@ -223,11 +223,7 @@ func (ntg NTGVision) SearchZips(zips []string) ([]Job, error) {
 
 func (ntg NTGVision) workingHours(now time.Time) bool {
 	// TODO assert M-F 9-4 EST
-	location, err := time.LoadLocation("EST")
-	if err != nil {
-		panic(err)
-	}
-	now = now.In(location)
+	now = now.In(time.FixedZone("EST", -5*60*60))
 	switch now.Weekday() {
 	case time.Sunday, time.Saturday:
 		return false