diff --git a/owrx/wsjt.py b/owrx/wsjt.py
index df3eda9..b0c8c4b 100644
--- a/owrx/wsjt.py
+++ b/owrx/wsjt.py
@@ -1,6 +1,6 @@
 import threading
 import wave
-from datetime import datetime, timedelta, date
+from datetime import datetime, timedelta, date, timezone
 import time
 import sched
 import subprocess
@@ -31,7 +31,7 @@ class WsjtChopper(threading.Thread):
         filename = "{tmp_dir}/openwebrx-wsjtchopper-{id}-{timestamp}.wav".format(
             tmp_dir = self.tmp_dir,
             id = id(self),
-            timestamp = datetime.now().strftime("%Y%m%d-%H%M%S")
+            timestamp = datetime.utcnow().strftime(self.fileTimestampFormat)
         )
         wavefile = wave.open(filename, "wb")
         wavefile.setnchannels(1)
@@ -71,9 +71,9 @@ class WsjtChopper(threading.Thread):
         self._scheduleNextSwitch()
 
     def decoder_commandline(self, file):
-        '''
+        """
         must be overridden in child classes
-        '''
+        """
         return []
 
     def decode(self):
@@ -128,6 +128,7 @@ class WsjtChopper(threading.Thread):
 class Ft8Chopper(WsjtChopper):
     def __init__(self, source):
         self.interval = 15
+        self.fileTimestampFormat = "%y%m%d_%H%M%S"
         super().__init__(source)
 
     def decoder_commandline(self, file):
@@ -138,6 +139,7 @@ class Ft8Chopper(WsjtChopper):
 class WsprChopper(WsjtChopper):
     def __init__(self, source):
         self.interval = 120
+        self.fileTimestampFormat = "%y%m%d_%H%M"
         super().__init__(source)
 
     def decoder_commandline(self, file):
@@ -148,6 +150,7 @@ class WsprChopper(WsjtChopper):
 class Jt65Chopper(WsjtChopper):
     def __init__(self, source):
         self.interval = 60
+        self.fileTimestampFormat = "%y%m%d_%H%M"
         super().__init__(source)
 
     def decoder_commandline(self, file):
@@ -158,6 +161,7 @@ class Jt65Chopper(WsjtChopper):
 class Jt9Chopper(WsjtChopper):
     def __init__(self, source):
         self.interval = 60
+        self.fileTimestampFormat = "%y%m%d_%H%M"
         super().__init__(source)
 
     def decoder_commandline(self, file):
@@ -167,8 +171,6 @@ class Jt9Chopper(WsjtChopper):
 
 class WsjtParser(object):
     locator_pattern = re.compile(".*\\s([A-Z0-9]+)\\s([A-R]{2}[0-9]{2})$")
-    jt9_pattern = re.compile("^([0-9]{6}|\\*{4}) .*")
-    wspr_pattern = re.compile("^[0-9]{4} .*")
     wspr_splitter_pattern = re.compile("([A-Z0-9]*)\\s([A-R]{2}[0-9]{2})\\s([0-9]+)")
 
     def __init__(self, handler):
@@ -191,38 +193,45 @@ class WsjtParser(object):
             if msg.startswith(" EOF on input file"):
                 return
 
-            out = {}
-            if WsjtParser.jt9_pattern.match(msg):
+            modes = list(WsjtParser.modes.keys())
+            if msg[21] in modes or msg[19] in modes:
                 out = self.parse_from_jt9(msg)
-            elif WsjtParser.wspr_pattern.match(msg):
+            else:
                 out = self.parse_from_wsprd(msg)
 
             self.handler.write_wsjt_message(out)
         except ValueError:
             logger.exception("error while parsing wsjt message")
 
+    def parse_timestamp(self, instring, dateformat):
+        ts = datetime.strptime(instring, dateformat).replace(tzinfo=timezone.utc)
+        return int(datetime.combine(date.today(), ts.time(), timezone.utc).timestamp() * 1000)
+
     def parse_from_jt9(self, msg):
         # ft8 sample
         # '222100 -15 -0.0  508 ~  CQ EA7MJ IM66'
         # jt65 sample
-        # '**** -10  0.4 1556 #  CQ RN6AM KN95'
-        out = {}
-        if msg.startswith("****"):
-            out["timestamp"] = int(datetime.now().timestamp() * 1000)
-            msg = msg[5:]
+        # '2352  -7  0.4 1801 #  R0WAS R2ABM KO85'
+        # '0003  -4  0.4 1762 #  CQ R2ABM KO85'
+        modes = list(WsjtParser.modes.keys())
+        if msg[19] in modes:
+            dateformat = "%H%M"
         else:
-            ts = datetime.strptime(msg[0:6], "%H%M%S")
-            out["timestamp"] = int(datetime.combine(date.today(), ts.time(), datetime.now().tzinfo).timestamp() * 1000)
-            msg = msg[7:]
-        out["db"] = float(msg[0:3])
-        out["dt"] = float(msg[4:8])
-        out["freq"] = int(msg[9:13])
+            dateformat = "%H%M%S"
+        timestamp = self.parse_timestamp(msg[0:len(dateformat)], dateformat)
+        msg = msg[len(dateformat) + 1:]
         modeChar = msg[14:15]
-        out["mode"] = mode = WsjtParser.modes[modeChar] if modeChar in WsjtParser.modes else "unknown"
+        mode = WsjtParser.modes[modeChar] if modeChar in WsjtParser.modes else "unknown"
         wsjt_msg = msg[17:53].strip()
         self.parseLocator(wsjt_msg, mode)
-        out["msg"] = wsjt_msg
-        return out
+        return {
+            "timestamp": timestamp,
+            "db": float(msg[0:3]),
+            "dt": float(msg[4:8]),
+            "freq": int(msg[9:13]),
+            "mode": mode,
+            "msg": wsjt_msg
+        }
 
     def parseLocator(self, msg, mode):
         m = WsjtParser.locator_pattern.match(msg)
@@ -237,19 +246,18 @@ class WsjtParser(object):
     def parse_from_wsprd(self, msg):
         # wspr sample
         # '2600 -24  0.4   0.001492 -1  G8AXA JO01 33'
-        out = {}
-        now = datetime.now()
-        ts = datetime.strptime(msg[0:4], "%M%S").replace(hour=now.hour)
-        out["timestamp"] = int(datetime.combine(date.today(), ts.time(), now.tzinfo).timestamp() * 1000)
-        out["db"] = float(msg[5:8])
-        out["dt"] = float(msg[9:13])
-        out["freq"] = float(msg[14:24])
-        out["drift"] = int(msg[25:28])
-        out["mode"] = "WSPR"
+        # '0052 -29  2.6   0.001486  0  G02CWT IO92 23'
         wsjt_msg = msg[29:].strip()
-        out["msg"] = wsjt_msg
         self.parseWsprMessage(wsjt_msg)
-        return out
+        return {
+            "timestamp": self.parse_timestamp(msg[0:4], "%H%M"),
+            "db": float(msg[5:8]),
+            "dt": float(msg[9:13]),
+            "freq": float(msg[14:24]),
+            "drift": int(msg[25:28]),
+            "mode": "WSPR",
+            "msg": wsjt_msg
+        }
 
     def parseWsprMessage(self, msg):
         m = WsjtParser.wspr_splitter_pattern.match(msg)