diff --git a/src/Timezone.cpp b/src/Timezone.cpp
index fbf4fdf..110ab72 100644
--- a/src/Timezone.cpp
+++ b/src/Timezone.cpp
@@ -12,6 +12,13 @@
     #include <avr/eeprom.h>
 #endif
 
+TimeChangeRule::TimeChangeRule(const char *a, uint8_t w, uint8_t d,
+                               uint8_t m, uint8_t h, int o)
+    : week(w), dow(d), month(m), hour(h), offset(o)
+{
+    strncpy(abbrev, a, sizeof(abbrev));
+}
+
 /*----------------------------------------------------------------------*
  * Create a Timezone object from the given time change rules.           *
  *----------------------------------------------------------------------*/
diff --git a/src/Timezone.h b/src/Timezone.h
index 8d353ec..9e18f8f 100644
--- a/src/Timezone.h
+++ b/src/Timezone.h
@@ -30,6 +30,10 @@ struct TimeChangeRule
     uint8_t month;     // 1=Jan, 2=Feb, ... 12=Dec
     uint8_t hour;      // 0-23
     int offset;        // offset from UTC in minutes
+
+    TimeChangeRule() = default;
+    TimeChangeRule(const char *abbrev, uint8_t week, uint8_t dow, 
+                   uint8_t month, uint8_t hour, int offset);
 };
         
 class Timezone