diff --git a/sessions/sessions_test.go b/sessions/sessions_test.go
index b621f3f05..2f3547815 100644
--- a/sessions/sessions_test.go
+++ b/sessions/sessions_test.go
@@ -75,8 +75,8 @@ func TestSessionSIndexAndUnindexSessions(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "cgrates.org",
 		utils.RequestType:      "*prepaid",
-		utils.SetupTime:        "2015-11-09 14:21:24",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.SetupTime:        "2015-11-09T14:21:24Z",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",
@@ -397,8 +397,8 @@ func TestSessionSRegisterAndUnregisterASessions(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "cgrates.org",
 		utils.RequestType: "*prepaid",
-		utils.SetupTime:   "2015-11-09 14:21:24",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.SetupTime:   "2015-11-09T14:21:24Z",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -457,7 +457,7 @@ func TestSessionSRegisterAndUnregisterASessions(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "itsyscom.com",
 		utils.RequestType: "*prepaid",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -524,7 +524,7 @@ func TestSessionSRegisterAndUnregisterASessions(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "itsyscom.com",
 		utils.RequestType:      "*prepaid",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",
@@ -618,8 +618,8 @@ func TestSessionSRegisterAndUnregisterPSessions(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "cgrates.org",
 		utils.RequestType: "*prepaid",
-		utils.SetupTime:   "2015-11-09 14:21:24",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.SetupTime:   "2015-11-09T14:21:24Z",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -681,7 +681,7 @@ func TestSessionSRegisterAndUnregisterPSessions(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "itsyscom.com",
 		utils.RequestType: "*prepaid",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -748,7 +748,7 @@ func TestSessionSRegisterAndUnregisterPSessions(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "itsyscom.com",
 		utils.RequestType:      "*prepaid",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",
@@ -1393,8 +1393,8 @@ func TestSessionStransitSState(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "cgrates.org",
 		utils.RequestType: "*prepaid",
-		utils.SetupTime:   "2015-11-09 14:21:24",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.SetupTime:   "2015-11-09T14:21:24Z",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -1440,8 +1440,8 @@ func TestSessionSrelocateSessionS(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "cgrates.org",
 		utils.RequestType: "*prepaid",
-		utils.SetupTime:   "2015-11-09 14:21:24",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.SetupTime:   "2015-11-09T14:21:24Z",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -1634,8 +1634,8 @@ func TestSessionSgetSessionIDsMatchingIndexes(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "cgrates.org",
 		utils.RequestType:      "*prepaid",
-		utils.SetupTime:        "2015-11-09 14:21:24",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.SetupTime:        "2015-11-09T14:21:24Z",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",
@@ -1919,8 +1919,8 @@ func TestSessionSgetSession(t *testing.T) {
 		utils.Category:    "call",
 		utils.Tenant:      "cgrates.org",
 		utils.RequestType: "*prepaid",
-		utils.SetupTime:   "2015-11-09 14:21:24",
-		utils.AnswerTime:  "2015-11-09 14:22:02",
+		utils.SetupTime:   "2015-11-09T14:21:24Z",
+		utils.AnswerTime:  "2015-11-09T14:22:02Z",
 		utils.Usage:       "1m23s",
 		utils.LastUsed:    "21s",
 		utils.PDD:         "300ms",
@@ -1967,8 +1967,8 @@ func TestSessionSfilterSessions(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "cgrates.org",
 		utils.RequestType:      "*prepaid",
-		utils.SetupTime:        "2015-11-09 14:21:24",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.SetupTime:        "2015-11-09T14:21:24Z",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",
@@ -2003,11 +2003,11 @@ func TestSessionSfilterSessions(t *testing.T) {
 	sr2[utils.Subject] = "subject2"
 	sr2[utils.CGRID] = GetSetCGRID(sEv)
 	sS.registerSession(session, false)
-	st, err := utils.IfaceAsTime("2015-11-09T14:21:24+02:00", "")
+	st, err := utils.IfaceAsTime("2015-11-09T14:21:24Z", "")
 	if err != nil {
 		t.Fatal(err)
 	}
-	at, err := utils.IfaceAsTime("2015-11-09T14:22:02+02:00", "")
+	at, err := utils.IfaceAsTime("2015-11-09T14:22:02Z", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -2146,8 +2146,8 @@ func TestSessionSfilterSessionsCount(t *testing.T) {
 		utils.Category:         "call",
 		utils.Tenant:           "cgrates.org",
 		utils.RequestType:      "*prepaid",
-		utils.SetupTime:        "2015-11-09 14:21:24",
-		utils.AnswerTime:       "2015-11-09 14:22:02",
+		utils.SetupTime:        "2015-11-09T14:21:24Z",
+		utils.AnswerTime:       "2015-11-09T14:22:02Z",
 		utils.Usage:            "1m23s",
 		utils.LastUsed:         "21s",
 		utils.PDD:              "300ms",