diff --git a/src/main/java/org/orekit/rugged/errors/RuggedMessages.java b/src/main/java/org/orekit/rugged/errors/RuggedMessages.java
index e657479f34b7395dac153d422e033f6ef1eb2356..416bba204d447af9a66a956db09eafdfaef05759 100644
--- a/src/main/java/org/orekit/rugged/errors/RuggedMessages.java
+++ b/src/main/java/org/orekit/rugged/errors/RuggedMessages.java
@@ -55,7 +55,7 @@ public enum RuggedMessages implements Localizable {
     OUT_OF_TILE_ANGLES("no data at latitude {0} and longitude {1}, tile covers only latitudes {2} to {3} and longitudes {4} to {5}"),
     NO_DEM_DATA("no Digital Elevation Model data at latitude {0} and longitude {1}"),
     TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED("the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood"),
-    OUT_OF_TIME_RANGE("date {0} is out of time span [{1}, {2}]"),
+    OUT_OF_TIME_RANGE("date {0} is out of time span [{1}, {2}] (UTC)"),
     UNINITIALIZED_CONTEXT("general context has not been initialized (missing call to {0})"),
     EMPTY_TILE("tile is empty: {0} ⨉ {1}"),
     UNKNOWN_SENSOR("unknown sensor {0}"),
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
index c65fd1b2371f9235c7f658925aa77bcfb9f6647e..5cffbc9118488232c3ba50612d1eb078b1aca5cf 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_de.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = <MISSING TRANSLATION>
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = Angabe {0} ist außerhalb der Zeitspanne [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = Angabe {0} ist außerhalb der Zeitspanne [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = <MISSING TRANSLATION>
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
index 7d5f68fab8a4151c3b88367ce7b60d238eb458aa..fab5d639f9c886918fcb3cf06b8cd3a5aee1005c 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_en.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = no Digital Elevation Model data at latitude {0} and longitude {1}
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = date {0} is out of time span [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = date {0} is out of time span [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = general context has not been initialized (missing call to {0})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_es.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_es.utf8
index 44b538430d2af4605ef34c71863208528ac7bc29..a69adf7509b20b2aec97cda3f6540ff687e936e2 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_es.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_es.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = la faceta seleccionada para la latitud {0} y longitud {1} no cumple el requisito de vecindad
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = la fecha {0} está fuera del intervalo temporal [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = la fecha {0} está fuera del intervalo temporal [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = el contexto general no ha sido inicializado (falta hacer la llamada a {0})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
index b3e5c040e8f8c48a3cb89439fb85ed967c40dd1f..dd0357672ec1bb9dbdf643c09519a927f8642273 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_fr.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = aucune donnée à la latitude {0} et à la longitude {1} dans le M
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = la tuile sélectionnée pour la latitude {0} et la longitude {1} ne contient pas le voisinage requis pour ce point
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = la date {0} est hors de la plage temporelle [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = la date {0} est hors de la plage temporelle [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = le contexte général n''a pas été initialisé (appel manquant à {0})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_gl.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_gl.utf8
index b927d20a22e3eaaf5541199a0b1c9b75fd0e1d6e..ffb0978899ee5262c2d94927e3db06696cbc0aba 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_gl.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_gl.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = a faceta seleccionada para a latitude {0} e lonxitude {1} non cumpre o requisito de veciñanza
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = a data {0} está fora do intervalo temporal [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = a data {0} está fora do intervalo temporal [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = o contexto xeral non foi inicializado (falta face-la chamada a {0})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_it.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_it.utf8
index 35ae33430a3d11cecff9c95c44374ae535c8c302..21b54586d1587e5b2b123ab0c176a131a0cb6421 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_it.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_it.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = il quadrante selezionato per la latitudine {0} e la longitudine {1} non contiene i punti dei dintorni richiesti
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = la data {0} è fuori dell''intervallo temporale [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = la data {0} è fuori dell''intervallo temporale [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = il contesto generale non è stato inizializzato (chiamata mancante a {0})
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_no.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_no.utf8
index 90280718842ca66ec803b808c3786fa2b2293f4e..05765b86097bca0a18fba3841ea64ecd2aa2f5cc 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_no.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_no.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = den valgte flisen for breddegrad {0} og lengdegrad {1} inneholder ikke nødvendig nabopunkt
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = datoen {0} er utenfor perioden [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = datoen {0} er utenfor perioden [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = generell kontekst har ikke blitt initialisert ({0} har ikke blitt kalt)
diff --git a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_ro.utf8 b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_ro.utf8
index 900187a721af177d906e4c800cb9b2fa15a4ba76..68d195bb5fdde088d0462ed3e659e2713f102eb9 100644
--- a/src/main/resources/assets/org/orekit/rugged/RuggedMessages_ro.utf8
+++ b/src/main/resources/assets/org/orekit/rugged/RuggedMessages_ro.utf8
@@ -13,8 +13,8 @@ NO_DEM_DATA = <MISSING TRANSLATION>
 # the tile selected for latitude {0} and longitude {1} does not contain required point neighborhood
 TILE_WITHOUT_REQUIRED_NEIGHBORS_SELECTED = regiunea selectată pentru latitudinea {0} și longitudinea {1} nu conține vecinătatea necesară a punctului
 
-# date {0} is out of time span [{1}, {2}]
-OUT_OF_TIME_RANGE = data {0} este în afara intervalului [{1}, {2}]
+# date {0} is out of time span [{1}, {2}] (UTC)
+OUT_OF_TIME_RANGE = data {0} este în afara intervalului [{1}, {2}] (UTC)
 
 # general context has not been initialized (missing call to {0})
 UNINITIALIZED_CONTEXT = contextul general nu a fost inițializat (lipsește apelul către {0})