Use timezone during evaluation

Author: bernardjkim

lib/accessmonitoring/schedule.go

@@ -47,7 +47,14 @@ func inSchedule(schedule *accessmonitoringrulesv1.Schedule, timestamp time.Time)
 		return false, nil
 	}
 
+	loc, err := time.LoadLocation(schedule.GetTime().GetTimezone())
+	if err != nil {
+		return false, trace.Wrap(err)
+	}
+
+	timestamp = timestamp.In(loc)
 	weekday := timestamp.Weekday().String()
+
 	for _, shift := range schedule.GetTime().GetShifts() {
 		if weekday != shift.Weekday {
 			continue

lib/accessmonitoring/schedule_test.go

@@ -122,6 +122,46 @@ func TestInSchedule(t *testing.T) {
 			assertErr:        require.NoError,
 			assertInSchedule: require.False,
 		},
+		{
+			description: "invalid timezone",
+			schedules: map[string]*accessmonitoringrulesv1.Schedule{
+				"default": {
+					Time: &accessmonitoringrulesv1.TimeSchedule{
+						Timezone: "invalid",
+						Shifts: []*accessmonitoringrulesv1.TimeSchedule_Shift{
+							{
+								Weekday: time.Monday.String(),
+								Start:   "14:00",
+								End:     "15:00",
+							},
+						},
+					},
+				},
+			},
+			assertErr: func(t require.TestingT, err error, _ ...any) {
+				require.ErrorContains(t, err, "unknown time zone")
+			},
+			assertInSchedule: require.False,
+		},
+		{
+			description: "different timezone",
+			schedules: map[string]*accessmonitoringrulesv1.Schedule{
+				"default": {
+					Time: &accessmonitoringrulesv1.TimeSchedule{
+						Timezone: "America/Los_Angeles",
+						Shifts: []*accessmonitoringrulesv1.TimeSchedule_Shift{
+							{
+								Weekday: time.Monday.String(),
+								Start:   "14:00",
+								End:     "15:00",
+							},
+						},
+					},
+				},
+			},
+			assertErr:        require.NoError,
+			assertInSchedule: require.False,
+		},
 		{
 			description: "different weekday",
 			schedules: map[string]*accessmonitoringrulesv1.Schedule{