L2SS-244: Return a max datetime in case of parse issues, not a min datetime...

L2SS-244: Return a max datetime in case of parse issues, not a min datetime which also indicates zeroes

devices/clients/SDP_statistics.py

@@ -212,13 +212,16 @@ class StatisticsPacket(object):
         return unpack("<Q",self.packet[24:32])[0]
 
     def timestamp(self) -> datetime:
-        """ Returns the timestamp of the data in this packet. """
+        """ Returns the timestamp of the data in this packet. 
+        
+            Returns datetime.min if the block_serial_number in the packet is not set (0),
+            Returns datetime.max if the timestamp cannot be represented in python (likely because it is too large). """
 
         try:
             return datetime.fromtimestamp(self.block_serial_number * self.block_period(), timezone.utc)
         except ValueError:
             # Let's not barf anytime we want to print a header
-            return datetime.fromtimestamp(0, timezone.utc)
+            return datetime.max
 
     def header(self) -> dict:
         """ Return all the header fields as a dict. """