diff --git a/lib/modules/Calendar.pmod/Timezone.pmod b/lib/modules/Calendar.pmod/Timezone.pmod
index 1609caaa28be7a46057c71a09ec41f20ed237cc5..6dfa05b70f68de2aa426dd22f483afb859138fd5 100644
--- a/lib/modules/Calendar.pmod/Timezone.pmod
+++ b/lib/modules/Calendar.pmod/Timezone.pmod
@@ -758,7 +758,7 @@ class Runtime_timezone_compiler
 
    // ---
 
-#define INF_YEAR 2050
+#define INF_YEAR 2100
 #define NUL_YEAR 1850
 
 	 int y1=(int)a[0] || NUL_YEAR;