diff --git a/src/main/java/org/mtransit/parser/gtfs/GReader.java b/src/main/java/org/mtransit/parser/gtfs/GReader.java
index 13f47c1..32b0554 100644
--- a/src/main/java/org/mtransit/parser/gtfs/GReader.java
+++ b/src/main/java/org/mtransit/parser/gtfs/GReader.java
@@ -38,6 +38,7 @@
 import java.nio.file.Files;
 import java.sql.PreparedStatement;
 import java.text.DateFormat;
+import java.time.ZoneId;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Date;
@@ -175,8 +176,11 @@ public static GSpec readGtfsZipFile(
 			}
 			// STOPS (after stop times)
 			if (!calendarsOnly && !routeTripCalendarsOnly) {
+				final GAgency singleAgency = gSpec.getSingleAgency();
+				//noinspection DiscouragedApi
+				final String agencyTimezone = singleAgency == null ? null : singleAgency.getAgencyTimezone();
 				readFile(gtfsDir, GStop.FILENAME, true, line ->
-						processStop(agencyTools, gSpec, line, skipDataCleanup)
+						processStop(agencyTools, gSpec, line, skipDataCleanup, agencyTimezone)
 				);
 			}
 			// TODO OTHER FILES TYPE
@@ -412,9 +416,11 @@ private static void processFrequency(
 		}
 	}
 
+	private static final Set<String> AVAILABLE_TIME_ZONE_IDS = ZoneId.getAvailableZoneIds(); // cache because it returns new set copy every time
+
 	private static void processAgency(GAgencyTools agencyTools, GSpec gSpec, HashMap<String, String> line) {
 		try {
-			final GAgency gAgency = GAgency.fromLine(line);
+			final GAgency gAgency = GAgency.fromLine(line, AVAILABLE_TIME_ZONE_IDS);
 			if (agencyTools.excludeAgency(gAgency)) {
 				MTLog.logDebug("processAgency() > SKIP (exclude agency)");
 				return;
@@ -546,14 +552,15 @@ private static void processTrip(
 		}
 	}
 
-	private static void processStop(GAgencyTools agencyTools, GSpec gSpec, Map<String, String> line, boolean skipDataCleanup) {
+	private static void processStop(GAgencyTools agencyTools, GSpec gSpec, Map<String, String> line, boolean skipDataCleanup, @Nullable String agencyTimezone) {
 		try {
 			final GLocationType stopLocationType = GLocationType.parse(line.get(GStop.LOCATION_TYPE));
 			if (stopLocationType == GLocationType.GENERIC_NODE) {
 				MTLog.log("Generic node stop ignored (%s).", line); // not lat/lng?
 				return;
 			}
-			final GStop gStop = skipDataCleanup ? GStop.fromLine(line) : GStop.fromLine(line, agencyTools);
+			final GStop gStop = skipDataCleanup ? GStop.fromLine(line, agencyTimezone, AVAILABLE_TIME_ZONE_IDS)
+					: GStop.fromLine(line, agencyTimezone, AVAILABLE_TIME_ZONE_IDS, agencyTools);
 			if (agencyTools.excludeStop(gStop)) {
 				//noinspection DiscouragedApi
 				logExclude("Exclude stop: %s.", line.get(GStop.STOP_ID));
@@ -575,8 +582,9 @@ private static void processStop(GAgencyTools agencyTools, GSpec gSpec, Map<Strin
 				if (previousStop != null && previousStop.equalsExceptMergeable(gStop)) {
 					final double mergedLat = GStop.mergeLocation(previousStop.getStopLat(), gStop.getStopLat());
 					final double mergedLng = GStop.mergeLocation(previousStop.getStopLong(), gStop.getStopLong());
+					final String mergedTimeZoneId = GStop.mergeTimezone(previousStop.getStopTimezone(), gStop.getStopTimezone());
 					final GWheelchairBoardingType mergedWheelchairBoarding = GWheelchairBoardingType.merge(previousStop.getWheelchairBoarding(), gStop.getWheelchairBoarding());
-					gSpec.addStop(previousStop.clone(mergedLat, mergedLng, mergedWheelchairBoarding), true);
+					gSpec.addStop(previousStop.clone(mergedLat, mergedLng, mergedTimeZoneId, mergedWheelchairBoarding), true);
 					return;
 				}
 				if (previousStop != null) {
diff --git a/src/main/java/org/mtransit/parser/gtfs/data/GAgency.kt b/src/main/java/org/mtransit/parser/gtfs/data/GAgency.kt
index 33a157f..a00fc17 100644
--- a/src/main/java/org/mtransit/parser/gtfs/data/GAgency.kt
+++ b/src/main/java/org/mtransit/parser/gtfs/data/GAgency.kt
@@ -82,11 +82,13 @@ data class GAgency(
         private const val AGENCY_EMAIL = "agency_email" // Optional
 
         @JvmStatic
-        fun fromLine(line: Map<String, String>) = GAgency(
+        fun fromLine(line: Map<String, String>, availableZoneIds: Set<String>) = GAgency(
             agencyId = line[AGENCY_ID].orEmpty(),
             agencyName = line[AGENCY_NAME] ?: throw MTLog.Fatal("Invalid GAgency from $line!"),
             agencyUrl = line[AGENCY_URL] ?: throw MTLog.Fatal("Invalid GAgency from $line!"),
-            agencyTimezone = line[AGENCY_TIMEZONE] ?: throw MTLog.Fatal("Invalid GAgency from $line!"),
+            agencyTimezone = line[AGENCY_TIMEZONE]?.trim()
+                ?.takeIf { availableZoneIds.contains(it) }
+                ?: throw MTLog.Fatal("Invalid GAgency from $line!"),
             agencyLang = line[AGENCY_LANG],
             agencyPhone = line[AGENCY_PHONE],
             agencyFareUrl = line[AGENCY_FARE_URL],
diff --git a/src/main/java/org/mtransit/parser/gtfs/data/GStop.kt b/src/main/java/org/mtransit/parser/gtfs/data/GStop.kt
index 98e2eaf..6d4429c 100644
--- a/src/main/java/org/mtransit/parser/gtfs/data/GStop.kt
+++ b/src/main/java/org/mtransit/parser/gtfs/data/GStop.kt
@@ -18,6 +18,7 @@ data class GStop(
     val stopCode: String,
     val locationType: GLocationType,
     val parentStationIdInt: Int?,
+    val stopTimezone: String?,
     var wheelchairBoarding: GWheelchairBoardingType,
 ) {
 
@@ -29,6 +30,7 @@ data class GStop(
         stopCode: String,
         locationType: Int?,
         parentStationId: StopId?,
+        stopTimezone: String?,
         wheelchairBoarding: Int?,
     ) : this(
         GIDs.getInt(stopId),
@@ -38,6 +40,7 @@ data class GStop(
         stopCode,
         GLocationType.parse(locationType),
         parentStationId?.let { GIDs.getInt(it) },
+        stopTimezone,
         GWheelchairBoardingType.parse(wheelchairBoarding),
     )
 
@@ -92,16 +95,19 @@ data class GStop(
         stopUrl = null, // TODO
         locationType = locationType.id,
         parentStationId = _parentStationId,
+        stopTimezone = stopTimezone,
         wheelchairBoarding = wheelchairBoarding.id,
     )
 
     fun clone(
         stopLat: Double,
         stopLong: Double,
+        stopTimezone: String?,
         wheelchairBoarding: GWheelchairBoardingType,
     ) = this.copy(
         stopLat = stopLat,
         stopLong = stopLong,
+        stopTimezone = stopTimezone,
         wheelchairBoarding = wheelchairBoarding,
     )
 
@@ -115,11 +121,12 @@ data class GStop(
         private const val STOP_CODE = "stop_code"
         internal const val LOCATION_TYPE = "location_type"
         private const val PARENT_STATION = "parent_station"
+        private const val STOP_TIMEZONE = "stop_timezone"
         private const val WHEELCHAIR_BOARDING = "wheelchair_boarding"
 
         @JvmOverloads
         @JvmStatic
-        fun fromLine(line: Map<String, String>, agencyTools: GAgencyTools? = null) = GStop(
+        fun fromLine(line: Map<String, String>, agencyTimezone: String?, availableZoneIds: Set<String>, agencyTools: GAgencyTools? = null) = GStop(
             stopId = line[STOP_ID]?.trim()
                 ?.let { agencyTools?.cleanStopOriginalId(it) ?: it }
                 ?: throw MTLog.Fatal("Invalid GStop from $line!"),
@@ -130,6 +137,14 @@ data class GStop(
             locationType = line[LOCATION_TYPE]?.takeIf { it.isNotBlank() }?.toInt(),
             parentStationId = line[PARENT_STATION]?.takeIf { it.isNotBlank() }?.trim()
                 ?.let { agencyTools?.cleanStopOriginalId(it) ?: it },
+            stopTimezone = line[STOP_TIMEZONE]?.trim()
+                ?.takeIf { it.isNotBlank() }
+                ?.also { gStopTimezone ->
+                    if (!availableZoneIds.contains(gStopTimezone)) {
+                        throw MTLog.Fatal("Invalid stop timezone in $line!")
+                    }
+                }
+                ?.takeIf { it != agencyTimezone },
             wheelchairBoarding = line[WHEELCHAIR_BOARDING]?.takeIf { it.isNotBlank() }?.toInt(),
         )
 
@@ -146,6 +161,7 @@ data class GStop(
                 stopCode = it.stopCode ?: EMPTY,
                 locationType = it.locationType,
                 parentStationId = it.parentStationId,
+                stopTimezone = it.stopTimezone,
                 wheelchairBoarding = it.wheelchairBoarding,
             )
         }
@@ -154,5 +170,11 @@ data class GStop(
         fun mergeLocation(loc1: Double, loc2: Double): Double {
             return floor((loc1 + loc2) / 2.00)
         }
+
+        @JvmStatic
+        fun mergeTimezone(tz1: String?, tz2: String?): String? {
+            if (tz1 == tz2) return tz1 // only kept if same
+            return null // will use agency TZ
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/org/mtransit/parser/mt/GenerateMObjectsTask.java b/src/main/java/org/mtransit/parser/mt/GenerateMObjectsTask.java
index 112dc1f..c13dc1f 100644
--- a/src/main/java/org/mtransit/parser/mt/GenerateMObjectsTask.java
+++ b/src/main/java/org/mtransit/parser/mt/GenerateMObjectsTask.java
@@ -710,6 +710,7 @@ private HashMap<Long, String> parseGTripStops(
 								gStop.getStopLong(),
 								gStop.getWheelchairBoarding().getId(),
 								gStop.getStopId(),
+								gStop.getStopTimezone(),
 								this.agencyTools
 						));
 			}
diff --git a/src/main/java/org/mtransit/parser/mt/data/MStop.kt b/src/main/java/org/mtransit/parser/mt/data/MStop.kt
index 5ed630e..3b58db1 100644
--- a/src/main/java/org/mtransit/parser/mt/data/MStop.kt
+++ b/src/main/java/org/mtransit/parser/mt/data/MStop.kt
@@ -4,6 +4,7 @@ import org.mtransit.commons.FeatureFlags
 import org.mtransit.commons.GTFSCommons
 import org.mtransit.commons.sql.SQLUtils
 import org.mtransit.parser.db.SQLUtils.quotesEscape
+import org.mtransit.parser.db.SQLUtils.quotesEscapeId
 import org.mtransit.parser.gtfs.GAgencyTools
 import org.mtransit.parser.mt.MDataChangedManager
 
@@ -15,6 +16,7 @@ data class MStop(
     val lng: Double,
     val accessible: Int,
     private val originalIdHash: Int,
+    val timeZoneId: String?,
 ) : Comparable<MStop> {
 
     constructor(
@@ -25,6 +27,7 @@ data class MStop(
         lng: Double,
         accessible: Int,
         originalId: String,
+        timeZoneId: String?,
         agencyTools: GAgencyTools? = null,
     ) : this(
         id,
@@ -34,21 +37,25 @@ data class MStop(
         lng,
         accessible,
         GTFSCommons.stringIdToHash(originalId),
+        timeZoneId
     )
 
     fun hasLat() = lat != 0.0
 
     fun hasLng() = lng != 0.0
 
-    fun toFile() = listOf(
-        id.toString(), // ID
-        code.quotesEscape(), // code
-        name.toStringIds(FeatureFlags.F_EXPORT_STRINGS).quotesEscape(), // name
-        MDataChangedManager.avoidLatLngChanged(lat), // latitude
-        MDataChangedManager.avoidLatLngChanged(lng), // longitude
-        accessible.toString(),
-        originalIdHash.toString(), // original ID hash
-    ).joinToString(SQLUtils.COLUMN_SEPARATOR)
+    fun toFile() = buildList {
+        add(id.toString()) // ID
+        add(code.quotesEscape()) // code
+        add(name.toStringIds(FeatureFlags.F_EXPORT_STRINGS).quotesEscape()) // name
+        add(MDataChangedManager.avoidLatLngChanged(lat)) // latitude
+        add(MDataChangedManager.avoidLatLngChanged(lng)) // longitude
+        add(accessible.toString())
+        add(originalIdHash.toString()) // original ID hash
+        if (FeatureFlags.F_EXPORT_STOP_TIMEZONE_ID) {
+            add(timeZoneId.orEmpty().quotesEscapeId()) // time zone ID (can contain "_")
+        }
+    }.joinToString(SQLUtils.COLUMN_SEPARATOR)
 
     override fun compareTo(other: MStop): Int {
         return id - other.id