--- /dev/null
+#!/bin/bash
+
+. test.common
+test_start "NTP eras"
+
+# Assume NTP_ERA_SPLIT is between years 1960 and 1990
+
+# Set date to 500 seconds before NTP second overflows, this should
+# work correctly with both 32-bit and 64-bit time_t
+export CLKNETSIM_START_DATE=$(date -d 'Feb 7 06:19:56 UTC 2036' +'%s')
+
+run_test || test_fail
+check_chronyd_exit || test_fail
+check_source_selection || test_fail
+check_packet_interval || test_fail
+check_sync || test_fail
+
+# The following tests need 64-bit time_t
+grep -q 'HAVE_LONG_TIME_T 1' ../../config.h || test_skip
+
+for year in 1990 2090; do
+ export CLKNETSIM_START_DATE=$(date -d "Jan 1 00:00:00 UTC $year" +'%s')
+ run_test || test_fail
+ check_chronyd_exit || test_fail
+ check_source_selection || test_fail
+ check_packet_interval || test_fail
+ check_sync || test_fail
+done
+
+for year in 1950 2130; do
+ export CLKNETSIM_START_DATE=$(date -d "Jan 1 00:00:00 UTC $year" +'%s')
+ run_test || test_fail
+ check_chronyd_exit || test_fail
+ check_source_selection || test_fail
+ check_packet_interval || test_fail
+ # This check is expected to fail
+ check_sync && test_fail
+done
+
+test_pass