diff --git a/.github/workflows/test-integration.yaml b/.github/workflows/test-integration.yaml
index aa220261..d5b362b7 100644
--- a/.github/workflows/test-integration.yaml
+++ b/.github/workflows/test-integration.yaml
@@ -45,6 +45,7 @@ jobs:
           - TestPingAllByIPPublicDERP
           - TestAuthKeyLogoutAndRelogin
           - TestEphemeral
+          - TestEphemeralInAlternateTimezone
           - TestEphemeral2006DeletedTooQuickly
           - TestPingAllByHostname
           - TestTaildrop
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fa5d7f74..bbb837fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -70,6 +70,8 @@ after improving the test harness as part of adopting [#1460](https://github.com/
 - Make registration page easier to use on mobile devices
 - Make write-ahead-log default on and configurable for SQLite [#1985](https://github.com/juanfont/headscale/pull/1985)
 - Add APIs for managing headscale policy. [#1792](https://github.com/juanfont/headscale/pull/1792)
+- Fix for registering nodes using preauthkeys when running on a postgres database in a non-UTC timezone. [#764](https://github.com/juanfont/headscale/issues/764)
+- Make sure integration tests cover postgres for all scenarios
 
 ## 0.22.3 (2023-05-12)
 
diff --git a/hscontrol/mapper/tail.go b/hscontrol/mapper/tail.go
index d21e4d8d..b0878d1a 100644
--- a/hscontrol/mapper/tail.go
+++ b/hscontrol/mapper/tail.go
@@ -93,7 +93,7 @@ func tailNode(
 		User: tailcfg.UserID(node.UserID),
 
 		Key:       node.NodeKey,
-		KeyExpiry: keyExpiry,
+		KeyExpiry: keyExpiry.UTC(),
 
 		Machine:    node.MachineKey,
 		DiscoKey:   node.DiscoKey,
@@ -102,7 +102,7 @@ func tailNode(
 		Endpoints:  node.Endpoints,
 		DERP:       derp,
 		Hostinfo:   node.Hostinfo.View(),
-		Created:    node.CreatedAt,
+		Created:    node.CreatedAt.UTC(),
 
 		Online: node.IsOnline,
 
diff --git a/hscontrol/mapper/tail_test.go b/hscontrol/mapper/tail_test.go
index ac50d5a6..f744c9c6 100644
--- a/hscontrol/mapper/tail_test.go
+++ b/hscontrol/mapper/tail_test.go
@@ -1,6 +1,7 @@
 package mapper
 
 import (
+	"encoding/json"
 	"net/netip"
 	"testing"
 	"time"
@@ -205,3 +206,68 @@ func TestTailNode(t *testing.T) {
 		})
 	}
 }
+
+func TestNodeExpiry(t *testing.T) {
+	tp := func(t time.Time) *time.Time {
+		return &t
+	}
+	tests := []struct {
+		name         string
+		exp          *time.Time
+		wantTime     time.Time
+		wantTimeZero bool
+	}{
+		{
+			name:         "no-expiry",
+			exp:          nil,
+			wantTimeZero: true,
+		},
+		{
+			name:         "zero-expiry",
+			exp:          &time.Time{},
+			wantTimeZero: true,
+		},
+		{
+			name:         "localtime",
+			exp:          tp(time.Time{}.Local()),
+			wantTimeZero: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			node := &types.Node{
+				GivenName: "test",
+				Expiry:    tt.exp,
+			}
+			tn, err := tailNode(
+				node,
+				0,
+				&policy.ACLPolicy{},
+				&types.Config{},
+			)
+			if err != nil {
+				t.Fatalf("nodeExpiry() error = %v", err)
+			}
+
+			// Round trip the node through JSON to ensure the time is serialized correctly
+			seri, err := json.Marshal(tn)
+			if err != nil {
+				t.Fatalf("nodeExpiry() error = %v", err)
+			}
+			var deseri tailcfg.Node
+			err = json.Unmarshal(seri, &deseri)
+			if err != nil {
+				t.Fatalf("nodeExpiry() error = %v", err)
+			}
+
+			if tt.wantTimeZero {
+				if !deseri.KeyExpiry.IsZero() {
+					t.Errorf("nodeExpiry() = %v, want zero", deseri.KeyExpiry)
+				}
+			} else if deseri.KeyExpiry != tt.wantTime {
+				t.Errorf("nodeExpiry() = %v, want %v", deseri.KeyExpiry, tt.wantTime)
+			}
+		})
+	}
+}
diff --git a/integration/general_test.go b/integration/general_test.go
index 2819edb2..6de00fd2 100644
--- a/integration/general_test.go
+++ b/integration/general_test.go
@@ -215,6 +215,14 @@ func TestAuthKeyLogoutAndRelogin(t *testing.T) {
 }
 
 func TestEphemeral(t *testing.T) {
+	testEphemeralWithOptions(t, hsic.WithTestName("ephemeral"))
+}
+
+func TestEphemeralInAlternateTimezone(t *testing.T) {
+	testEphemeralWithOptions(t, hsic.WithTestName("ephemeral-tz"), hsic.WithTimezone("America/Los_Angeles"))
+}
+
+func testEphemeralWithOptions(t *testing.T, opts ...hsic.Option) {
 	IntegrationSkip(t)
 	t.Parallel()
 
@@ -227,7 +235,7 @@ func TestEphemeral(t *testing.T) {
 		"user2": len(MustTestVersions),
 	}
 
-	headscale, err := scenario.Headscale(hsic.WithTestName("ephemeral"))
+	headscale, err := scenario.Headscale(opts...)
 	assertNoErrHeadscaleEnv(t, err)
 
 	for userName, clientCount := range spec {
diff --git a/integration/hsic/hsic.go b/integration/hsic/hsic.go
index bef05818..b9026225 100644
--- a/integration/hsic/hsic.go
+++ b/integration/hsic/hsic.go
@@ -211,6 +211,12 @@ func WithTuning(batchTimeout time.Duration, mapSessionChanSize int) Option {
 	}
 }
 
+func WithTimezone(timezone string) Option {
+	return func(hsic *HeadscaleInContainer) {
+		hsic.env["TZ"] = timezone
+	}
+}
+
 // New returns a new HeadscaleInContainer instance.
 func New(
 	pool *dockertest.Pool,
diff --git a/integration/run.sh b/integration/run.sh
index 8cad3f02..137bcfb7 100755
--- a/integration/run.sh
+++ b/integration/run.sh
@@ -26,6 +26,7 @@ run_tests() {
 			--volume "$PWD:$PWD" -w "$PWD"/integration \
 			--volume /var/run/docker.sock:/var/run/docker.sock \
 			--volume "$PWD"/control_logs:/tmp/control \
+			-e "HEADSCALE_INTEGRATION_POSTGRES" \
 			golang:1 \
 			go test ./... \
 			-failfast \
diff --git a/integration/scenario.go b/integration/scenario.go
index 6476fd58..075d1fd5 100644
--- a/integration/scenario.go
+++ b/integration/scenario.go
@@ -249,6 +249,10 @@ func (s *Scenario) Headscale(opts ...hsic.Option) (ControlServer, error) {
 		return headscale, nil
 	}
 
+	if usePostgresForTest {
+		opts = append(opts, hsic.WithPostgres())
+	}
+
 	headscale, err := hsic.New(s.pool, s.network, opts...)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create headscale container: %w", err)
@@ -465,10 +469,6 @@ func (s *Scenario) CreateHeadscaleEnv(
 	tsOpts []tsic.Option,
 	opts ...hsic.Option,
 ) error {
-	if usePostgresForTest {
-		opts = append(opts, hsic.WithPostgres())
-	}
-
 	headscale, err := s.Headscale(opts...)
 	if err != nil {
 		return err