diff --git a/smartapps/smartthings/button-controller.src/button-controller.groovy b/smartapps/smartthings/button-controller.src/button-controller.groovy
index 1f99b08..d03551b 100644
--- a/smartapps/smartthings/button-controller.src/button-controller.groovy
+++ b/smartapps/smartthings/button-controller.src/button-controller.groovy
@@ -294,8 +294,8 @@ private getTimeOk() {
 	def result = true
 	if (starting && ending) {
 		def currTime = now()
-		def start = timeToday(starting).time
-		def stop = timeToday(ending).time
+		def start = timeToday(starting, location.timeZone).time
+		def stop = timeToday(ending, location.timeZone).time
 		result = start < stop ? currTime >= start && currTime <= stop : currTime <= stop || currTime >= start
 	}
 	log.trace "timeOk = $result"