diff --git a/storage/conformance/conformance.go b/storage/conformance/conformance.go
index 5ebbf31c..490ce1d9 100644
--- a/storage/conformance/conformance.go
+++ b/storage/conformance/conformance.go
@@ -48,6 +48,7 @@ func RunTests(t *testing.T, newStorage func() storage.Storage) {
 		{"PasswordCRUD", testPasswordCRUD},
 		{"KeysCRUD", testKeysCRUD},
 		{"GarbageCollection", testGC},
+		{"TimezoneSupport", testTimezones},
 	})
 }
 
@@ -370,14 +371,23 @@ func testKeysCRUD(t *testing.T, s storage.Storage) {
 }
 
 func testGC(t *testing.T, s storage.Storage) {
-	n := time.Now().UTC()
+	est, err := time.LoadLocation("America/New_York")
+	if err != nil {
+		t.Fatal(err)
+	}
+	pst, err := time.LoadLocation("America/Los_Angeles")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expiry := time.Now().In(est)
 	c := storage.AuthCode{
 		ID:            storage.NewID(),
 		ClientID:      "foobar",
 		RedirectURI:   "https://localhost:80/callback",
 		Nonce:         "foobar",
 		Scopes:        []string{"openid", "email"},
-		Expiry:        n.Add(time.Second),
+		Expiry:        expiry,
 		ConnectorID:   "ldap",
 		ConnectorData: []byte(`{"some":"data"}`),
 		Claims: storage.Claims{
@@ -393,14 +403,21 @@ func testGC(t *testing.T, s storage.Storage) {
 		t.Fatalf("failed creating auth code: %v", err)
 	}
 
-	if _, err := s.GarbageCollect(n); err != nil {
-		t.Errorf("garbage collection failed: %v", err)
-	}
-	if _, err := s.GetAuthCode(c.ID); err != nil {
-		t.Errorf("expected to be able to get auth code after GC: %v", err)
+	for _, tz := range []*time.Location{time.UTC, est, pst} {
+		result, err := s.GarbageCollect(expiry.Add(-time.Hour).In(tz))
+		if err != nil {
+			t.Errorf("garbage collection failed: %v", err)
+		} else {
+			if result.AuthCodes != 0 || result.AuthRequests != 0 {
+				t.Errorf("expected no garbage collection results, got %#v", result)
+			}
+		}
+		if _, err := s.GetAuthCode(c.ID); err != nil {
+			t.Errorf("expected to be able to get auth code after GC: %v", err)
+		}
 	}
 
-	if r, err := s.GarbageCollect(n.Add(time.Minute)); err != nil {
+	if r, err := s.GarbageCollect(expiry.Add(time.Hour)); err != nil {
 		t.Errorf("garbage collection failed: %v", err)
 	} else if r.AuthCodes != 1 {
 		t.Errorf("expected to garbage collect 1 objects, got %d", r.AuthCodes)
@@ -422,7 +439,7 @@ func testGC(t *testing.T, s storage.Storage) {
 		State:               "bar",
 		ForceApprovalPrompt: true,
 		LoggedIn:            true,
-		Expiry:              n,
+		Expiry:              expiry,
 		ConnectorID:         "ldap",
 		ConnectorData:       []byte(`{"some":"data"}`),
 		Claims: storage.Claims{
@@ -438,14 +455,21 @@ func testGC(t *testing.T, s storage.Storage) {
 		t.Fatalf("failed creating auth request: %v", err)
 	}
 
-	if _, err := s.GarbageCollect(n); err != nil {
-		t.Errorf("garbage collection failed: %v", err)
-	}
-	if _, err := s.GetAuthRequest(a.ID); err != nil {
-		t.Errorf("expected to be able to get auth code after GC: %v", err)
+	for _, tz := range []*time.Location{time.UTC, est, pst} {
+		result, err := s.GarbageCollect(expiry.Add(-time.Hour).In(tz))
+		if err != nil {
+			t.Errorf("garbage collection failed: %v", err)
+		} else {
+			if result.AuthCodes != 0 || result.AuthRequests != 0 {
+				t.Errorf("expected no garbage collection results, got %#v", result)
+			}
+		}
+		if _, err := s.GetAuthRequest(a.ID); err != nil {
+			t.Errorf("expected to be able to get auth code after GC: %v", err)
+		}
 	}
 
-	if r, err := s.GarbageCollect(n.Add(time.Minute)); err != nil {
+	if r, err := s.GarbageCollect(expiry.Add(time.Hour)); err != nil {
 		t.Errorf("garbage collection failed: %v", err)
 	} else if r.AuthRequests != 1 {
 		t.Errorf("expected to garbage collect 1 objects, got %d", r.AuthRequests)
@@ -457,3 +481,49 @@ func testGC(t *testing.T, s storage.Storage) {
 		t.Errorf("expected storage.ErrNotFound, got %v", err)
 	}
 }
+
+// testTimezones tests that backends either fully support timezones or
+// do the correct standardization.
+func testTimezones(t *testing.T, s storage.Storage) {
+	est, err := time.LoadLocation("America/New_York")
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Create an expiry with timezone info. Only expect backends to be
+	// accurate to the millisecond
+	expiry := time.Now().In(est).Round(time.Millisecond)
+
+	c := storage.AuthCode{
+		ID:            storage.NewID(),
+		ClientID:      "foobar",
+		RedirectURI:   "https://localhost:80/callback",
+		Nonce:         "foobar",
+		Scopes:        []string{"openid", "email"},
+		Expiry:        expiry,
+		ConnectorID:   "ldap",
+		ConnectorData: []byte(`{"some":"data"}`),
+		Claims: storage.Claims{
+			UserID:        "1",
+			Username:      "jane",
+			Email:         "jane.doe@example.com",
+			EmailVerified: true,
+			Groups:        []string{"a", "b"},
+		},
+	}
+	if err := s.CreateAuthCode(c); err != nil {
+		t.Fatalf("failed creating auth code: %v", err)
+	}
+	got, err := s.GetAuthCode(c.ID)
+	if err != nil {
+		t.Fatalf("failed to get auth code: %v", err)
+	}
+
+	// Ensure that if the resulting time is converted to the same
+	// timezone, it's the same value. We DO NOT expect timezones
+	// to be preserved.
+	gotTime := got.Expiry.In(est)
+	wantTime := expiry
+	if !gotTime.Equal(wantTime) {
+		t.Fatalf("expected expiry %v got %v", wantTime, gotTime)
+	}
+}
diff --git a/storage/sql/migrate.go b/storage/sql/migrate.go
index d9c254d3..3bb410aa 100644
--- a/storage/sql/migrate.go
+++ b/storage/sql/migrate.go
@@ -9,7 +9,7 @@ func (c *conn) migrate() (int, error) {
 	_, err := c.Exec(`
 		create table if not exists migrations (
 			num integer not null,
-			at timestamp not null
+			at timestamptz not null
 		);
 	`)
 	if err != nil {
@@ -100,7 +100,7 @@ var migrations = []migration{
 				connector_id text not null,
 				connector_data bytea,
 		
-				expiry timestamp not null
+				expiry timestamptz not null
 			);
 		
 			create table auth_code (
@@ -119,7 +119,7 @@ var migrations = []migration{
 				connector_id text not null,
 				connector_data bytea,
 		
-				expiry timestamp not null
+				expiry timestamptz not null
 			);
 		
 			create table refresh_token (
@@ -151,7 +151,7 @@ var migrations = []migration{
 				verification_keys bytea not null, -- JSON array
 				signing_key bytea not null,       -- JSON object
 				signing_key_pub bytea not null,   -- JSON object
-				next_rotation timestamp not null
+				next_rotation timestamptz not null
 			);
 		`,
 	},
diff --git a/storage/sql/sql.go b/storage/sql/sql.go
index c1f57b0e..0d3026e4 100644
--- a/storage/sql/sql.go
+++ b/storage/sql/sql.go
@@ -4,6 +4,7 @@ package sql
 import (
 	"database/sql"
 	"regexp"
+	"time"
 
 	"github.com/Sirupsen/logrus"
 	"github.com/cockroachdb/cockroach-go/crdb"
@@ -28,6 +29,9 @@ type flavor struct {
 	//
 	// See: https://github.com/cockroachdb/docs/blob/63761c2e/_includes/app/txn-sample.go#L41-L44
 	executeTx func(db *sql.DB, fn func(*sql.Tx) error) error
+
+	// Does the flavor support timezones?
+	supportsTimezones bool
 }
 
 // A regexp with a replacement string.
@@ -69,6 +73,8 @@ var (
 			}
 			return tx.Commit()
 		},
+
+		supportsTimezones: true,
 	}
 
 	flavorSQLite3 = flavor{
@@ -80,7 +86,7 @@ var (
 			{matchLiteral("boolean"), "integer"},
 			// Translate other types.
 			{matchLiteral("bytea"), "blob"},
-			// {matchLiteral("timestamp"), "integer"},
+			{matchLiteral("timestamptz"), "timestamp"},
 			// SQLite doesn't have a "now()" method, replace with "date('now')"
 			{regexp.MustCompile(`\bnow\(\)`), "date('now')"},
 		},
@@ -107,6 +113,22 @@ func (f flavor) translate(query string) string {
 	return query
 }
 
+// translateArgs translates query parameters that may be unique to
+// a specific SQL flavor. For example, standardizing "time.Time"
+// types to UTC for clients that don't provide timezone support.
+func (c *conn) translateArgs(args []interface{}) []interface{} {
+	if c.flavor.supportsTimezones {
+		return args
+	}
+
+	for i, arg := range args {
+		if t, ok := arg.(time.Time); ok {
+			args[i] = t.UTC()
+		}
+	}
+	return args
+}
+
 // conn is the main database connection.
 type conn struct {
 	db     *sql.DB
@@ -122,17 +144,17 @@ func (c *conn) Close() error {
 
 func (c *conn) Exec(query string, args ...interface{}) (sql.Result, error) {
 	query = c.flavor.translate(query)
-	return c.db.Exec(query, args...)
+	return c.db.Exec(query, c.translateArgs(args)...)
 }
 
 func (c *conn) Query(query string, args ...interface{}) (*sql.Rows, error) {
 	query = c.flavor.translate(query)
-	return c.db.Query(query, args...)
+	return c.db.Query(query, c.translateArgs(args)...)
 }
 
 func (c *conn) QueryRow(query string, args ...interface{}) *sql.Row {
 	query = c.flavor.translate(query)
-	return c.db.QueryRow(query, args...)
+	return c.db.QueryRow(query, c.translateArgs(args)...)
 }
 
 // ExecTx runs a method which operates on a transaction.
@@ -163,15 +185,15 @@ type trans struct {
 
 func (t *trans) Exec(query string, args ...interface{}) (sql.Result, error) {
 	query = t.c.flavor.translate(query)
-	return t.tx.Exec(query, args...)
+	return t.tx.Exec(query, t.c.translateArgs(args)...)
 }
 
 func (t *trans) Query(query string, args ...interface{}) (*sql.Rows, error) {
 	query = t.c.flavor.translate(query)
-	return t.tx.Query(query, args...)
+	return t.tx.Query(query, t.c.translateArgs(args)...)
 }
 
 func (t *trans) QueryRow(query string, args ...interface{}) *sql.Row {
 	query = t.c.flavor.translate(query)
-	return t.tx.QueryRow(query, args...)
+	return t.tx.QueryRow(query, t.c.translateArgs(args)...)
 }
diff --git a/storage/storage.go b/storage/storage.go
index cd480326..22a9ea50 100644
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -44,11 +44,9 @@ type GCResult struct {
 	AuthCodes    int64
 }
 
-// Storage is the storage interface used by the server. Implementations, at minimum
-// require compare-and-swap atomic actions.
-//
-// Implementations are expected to perform their own garbage collection of
-// expired objects (expect keys, which are handled by the server).
+// Storage is the storage interface used by the server. Implementations are
+// required to be able to perform atomic compare-and-swap updates and either
+// support timezones or standardize on UTC.
 type Storage interface {
 	Close() error