The earliest UNIX timestamp which can be used on a real 32-bit system
is "1901-12-13 20:45:52".

--- a/libgnucash/engine/test/gtest-gnc-timezone.cpp
+++ b/libgnucash/engine/test/gtest-gnc-timezone.cpp
@@ -142,7 +142,7 @@ TEST(gnc_timezone_constructors, test_IANA_Belize_tz)
 TEST(gnc_timezone_constructors, test_IANA_Perth_tz)
 {
     TimeZoneProvider tzp("Australia/Perth");
-    for (int year = 1893; year < 2048; ++year)
+    for (int year = 1902; year < 2048; ++year)
     {
         auto tz = tzp.get(year);
 #ifdef __LP64__
@@ -204,7 +204,7 @@ TEST(gnc_timezone_constructors, test_IANA_Perth_tz)
 TEST(gnc_timezone_constructors, test_IANA_Minsk_tz)
 {
     TimeZoneProvider tzp("Europe/Minsk");
-    for (int year = 1870; year < 2020; ++year)
+    for (int year = 1902; year < 2020; ++year)
     {
         auto tz = tzp.get(year);
 #ifdef __LP64__