diff --git a/OsmAnd/src/net/osmand/plus/GPXUtilities.java b/OsmAnd/src/net/osmand/plus/GPXUtilities.java
index 93d36823b1..a5ef4ce17a 100644
--- a/OsmAnd/src/net/osmand/plus/GPXUtilities.java
+++ b/OsmAnd/src/net/osmand/plus/GPXUtilities.java
@@ -779,7 +779,7 @@ public class GPXUtilities {
 
 	public static String writeGpx(Writer output, GPXFile file, OsmandApplication ctx) {
 		try {
-			SimpleDateFormat format = new SimpleDateFormat(GPX_TIME_FORMAT);
+			SimpleDateFormat format = new SimpleDateFormat(GPX_TIME_FORMAT, Locale.US);
 			format.setTimeZone(TimeZone.getTimeZone("UTC"));
 			XmlSerializer serializer = PlatformUtil.newSerializer();
 			serializer.setOutput(output);
@@ -960,7 +960,7 @@ public class GPXUtilities {
 
 	public static GPXFile loadGPXFile(Context ctx, InputStream f) {
 		GPXFile res = new GPXFile();
-		SimpleDateFormat format = new SimpleDateFormat(GPX_TIME_FORMAT);
+		SimpleDateFormat format = new SimpleDateFormat(GPX_TIME_FORMAT, Locale.US);
 		format.setTimeZone(TimeZone.getTimeZone("UTC"));
 		try {
 			XmlPullParser parser = PlatformUtil.newXMLPullParser();
diff --git a/OsmAnd/src/net/osmand/plus/activities/ContributionVersionActivity.java b/OsmAnd/src/net/osmand/plus/activities/ContributionVersionActivity.java
index 72a351919c..0e780ff39b 100644
--- a/OsmAnd/src/net/osmand/plus/activities/ContributionVersionActivity.java
+++ b/OsmAnd/src/net/osmand/plus/activities/ContributionVersionActivity.java
@@ -33,6 +33,7 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 
 public class ContributionVersionActivity extends OsmandListActivity {
 
@@ -48,7 +49,7 @@ public class ContributionVersionActivity extends OsmandListActivity {
 	private Date currentInstalledDate;
 
 	private List<OsmAndBuild> downloadedBuilds = new ArrayList<OsmAndBuild>();
-	private SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy");
+	private SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy", Locale.US);
 	private File pathToDownload;
 	private OsmAndBuild currentSelectedBuild = null;
 	
diff --git a/OsmAnd/src/net/osmand/plus/activities/SavingTrackHelper.java b/OsmAnd/src/net/osmand/plus/activities/SavingTrackHelper.java
index 65144e9084..43857cec00 100644
--- a/OsmAnd/src/net/osmand/plus/activities/SavingTrackHelper.java
+++ b/OsmAnd/src/net/osmand/plus/activities/SavingTrackHelper.java
@@ -1,12 +1,9 @@
 package net.osmand.plus.activities;
 
-import java.io.File;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.text.format.DateFormat;
 
 import net.osmand.PlatformUtil;
 import net.osmand.data.LatLon;
@@ -25,10 +22,14 @@ import net.osmand.plus.monitoring.OsmandMonitoringPlugin;
 
 import org.apache.commons.logging.Log;
 
-import android.database.Cursor;
-import android.database.sqlite.SQLiteDatabase;
-import android.database.sqlite.SQLiteOpenHelper;
-import android.text.format.DateFormat;
+import java.io.File;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 
 public class SavingTrackHelper extends SQLiteOpenHelper {
 	
@@ -194,7 +195,7 @@ public class SavingTrackHelper extends SQLiteOpenHelper {
 					File fout = new File(dir, f + ".gpx"); //$NON-NLS-1$
 					if (!data.get(f).isEmpty()) {
 						WptPt pt = data.get(f).findPointToShow();
-						String fileName = f + "_" + new SimpleDateFormat("HH-mm_EEE").format(new Date(pt.time)); //$NON-NLS-1$						
+						String fileName = f + "_" + new SimpleDateFormat("HH-mm_EEE", Locale.US).format(new Date(pt.time)); //$NON-NLS-1$
 						fout = new File(dir, fileName + ".gpx"); //$NON-NLS-1$
 						int ind = 1;
 						while (fout.exists()) {
diff --git a/OsmAnd/src/net/osmand/plus/download/DownloadActivityType.java b/OsmAnd/src/net/osmand/plus/download/DownloadActivityType.java
index c9ca181484..883886b506 100644
--- a/OsmAnd/src/net/osmand/plus/download/DownloadActivityType.java
+++ b/OsmAnd/src/net/osmand/plus/download/DownloadActivityType.java
@@ -1,15 +1,6 @@
 package net.osmand.plus.download;
 
-import static net.osmand.IndexConstants.BINARY_MAP_INDEX_EXT;
-
-import java.io.File;
-import java.io.IOException;
-import java.net.URLEncoder;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.Map;
+import android.content.Context;
 
 import net.osmand.AndroidUtils;
 import net.osmand.IndexConstants;
@@ -22,10 +13,20 @@ import net.osmand.util.Algorithms;
 
 import org.xmlpull.v1.XmlPullParser;
 
-import android.content.Context;
+import java.io.File;
+import java.io.IOException;
+import java.net.URLEncoder;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+import static net.osmand.IndexConstants.BINARY_MAP_INDEX_EXT;
 
 public class DownloadActivityType {
-	private static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd.MM.yyyy");
+	private static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd.MM.yyyy", Locale.US);
 	private static Map<String, DownloadActivityType> byTag = new HashMap<>();
 	
 	public static final DownloadActivityType NORMAL_FILE =
diff --git a/OsmAnd/src/net/osmand/plus/helpers/GpxImportHelper.java b/OsmAnd/src/net/osmand/plus/helpers/GpxImportHelper.java
index f2f22ccea4..f2f7e8ecf6 100644
--- a/OsmAnd/src/net/osmand/plus/helpers/GpxImportHelper.java
+++ b/OsmAnd/src/net/osmand/plus/helpers/GpxImportHelper.java
@@ -34,6 +34,7 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
+import java.util.Locale;
 
 /**
  * @author Koen Rabaey
@@ -281,7 +282,7 @@ public class GpxImportHelper {
 	private File getFileToSave(final String fileName, final File importDir, final GPXUtilities.WptPt pt) {
 		final StringBuilder builder = new StringBuilder(fileName);
 		if ("".equals(fileName)) {
-			builder.append("import_").append(new SimpleDateFormat("HH-mm_EEE").format(new Date(pt.time))).append(GPX_SUFFIX); //$NON-NLS-1$
+			builder.append("import_").append(new SimpleDateFormat("HH-mm_EEE", Locale.US).format(new Date(pt.time))).append(GPX_SUFFIX); //$NON-NLS-1$
 		}
 		if (fileName.endsWith(KML_SUFFIX)) {
 			builder.replace(builder.length() - KML_SUFFIX.length(), builder.length(), GPX_SUFFIX);
diff --git a/OsmAnd/src/net/osmand/plus/osmo/OsMoThread.java b/OsmAnd/src/net/osmand/plus/osmo/OsMoThread.java
index bfda09d432..cebdfbf10f 100644
--- a/OsmAnd/src/net/osmand/plus/osmo/OsMoThread.java
+++ b/OsmAnd/src/net/osmand/plus/osmo/OsMoThread.java
@@ -1,5 +1,16 @@
 package net.osmand.plus.osmo;
 
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Message;
+
+import net.osmand.PlatformUtil;
+import net.osmand.plus.osmo.OsMoService.SessionInfo;
+
+import org.apache.commons.logging.Log;
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.InetSocketAddress;
@@ -12,22 +23,12 @@ import java.util.Collection;
 import java.util.Date;
 import java.util.Iterator;
 import java.util.LinkedList;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
 import java.util.concurrent.ConcurrentLinkedQueue;
 
-import net.osmand.PlatformUtil;
-import net.osmand.plus.osmo.OsMoService.SessionInfo;
-
-import org.apache.commons.logging.Log;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Message;
-
 public class OsMoThread {
 //	private static String TRACKER_SERVER = "srv.osmo.mobi";
 //	private static int TRACKER_PORT = 3245;
@@ -63,7 +64,7 @@ public class OsMoThread {
 	private ByteBuffer pendingReadCommand = ByteBuffer.allocate(2048);
 	private LinkedList<String> queueOfMessages = new LinkedList<String>();
 	
-	private SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
+	private SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss", Locale.US);
 	
 	private ConcurrentLinkedQueue<String> lastCommands = new ConcurrentLinkedQueue<String>();
 	private final static int STACK_CMD = 30;