diff --git a/src/sun.c b/src/sun.c
index b0a1ddb..1a37daa 100644
--- a/src/sun.c
+++ b/src/sun.c
@@ -99,11 +99,11 @@ uint32_t calcSunSet(int year, int month, int day, float latitude,
 uint32_t calcDaylight(int month, float latitude, uint32_t rise, uint32_t set) {
   if (set == 0 || rise == 0) { 
     if (month < 4 || month > 9) {
-      if (latitude < 0) return 86400;
-      else return 0;
+      if (latitude <= -65.7) return 86400;
+      else if (latitude >= 65.7) return 0;
     } else {
-      if (latitude > 0) return 86400;
-      else return 0;
+      if (latitude >= 65.7) return 86400;
+      else if (latitude <= -65.7) return 0;
     }
   }