diff --git a/src/Net.cc b/src/Net.cc
index 1334aacd44..31ff2fa994 100644
--- a/src/Net.cc
+++ b/src/Net.cc
@@ -223,7 +223,11 @@ void expire_timers(iosource::PktSrc* src_ps)
 void net_packet_dispatch(double t, const Packet* pkt, iosource::PktSrc* src_ps)
 	{
 	if ( ! bro_start_network_time )
+		{
 		bro_start_network_time = t;
+		if ( network_time_init )
+			mgr.Enqueue(network_time_init, zeek::Args{});
+		}
 
 	// network_time never goes back.
 	net_update_time(timer_mgr->Time() < t ? t : timer_mgr->Time());
diff --git a/src/event.bif b/src/event.bif
index 8927aefa2c..57afa2be6b 100644
--- a/src/event.bif
+++ b/src/event.bif
@@ -35,7 +35,7 @@
 ## one-time initialization code at startup. At the time a handler runs, Zeek will
 ## have executed any global initializations and statements.
 ##
-## .. zeek:see:: zeek_done
+## .. zeek:see:: zeek_done, network_time_init
 ##
 ## .. note::
 ##
@@ -61,6 +61,14 @@ event zeek_init%(%);
 ##    is not generated.
 event zeek_done%(%);
 
+## Generated when network time is initialized. The event engine generates this
+## event after the network time has been determined but before processing of
+## packets is started.
+##
+## .. zeek:see:: zeek_init, network_time
+##
+event network_time_init%(%);
+
 ## Generated for every new connection. This event is raised with the first
 ## packet of a previously unknown connection. Zeek uses a flow-based definition
 ## of "connection" here that includes not only TCP sessions but also UDP and