Back to this long running but (for me) still inconclusive discussion.

Richard (rgphilpott): You seemed to provide the definitive answer I'd been seeking. If I understood correctly you said that I could change Mem-Map's behaviour by editing the GPX file, replacing all lines like "2011-10-05T08:46:54Z" with "2011-10-05T09:46:54+01:00".

Richard (USmmtech): You appeared to confirm that.

However, I just made that global replacement to a sample GPX file, but hovering over the track still shows the original times, not one hour later.

If it helps, here's the start of the revised GPX file:

<?xml version="1.0" encoding="ISO-8859-1"?>
<gpx version="1.1"
creator="Memory-Map 5.4.2.1089 http://www.memory-map.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.topografix.com/GPX/1/1"
xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
<trk>
<name>20110730-C2C-Day6</name>
<type>C2C ALL:C2C Actual</type>
<trkseg>
<trkpt lat="54.5554591497" lon="-2.7412378311"><ele>192</ele><time>2011-07-30T08:11:27+01:00</time></trkpt>
<trkpt lat="54.5550938288" lon="-2.7407826742"><ele>182</ele><time>2011-07-30T08:17:13+01:00</time></trkpt>
etc

I've duplicated this post here as well as the original discussion at
viewtopic.php?f=29&t=2092&p=17451#p17451
as I think it's rather more general than a Mobile Device > GPS topic.

--
Terry, East Grinstead, UK

Edit: I was mistaken. The current PC time factor must have confused me. I've now repeated several tests and summarise the results as follows:

GPX #1, walk in winter, start = 09:12 local time. Actual 1st trackpoint time in file = 09:12. Displayed by MM as 10:12 (incorrect). After global replacement = 09:12 (correct).

GPX #2, walk in summer, start 09:25 local time. Actual 1st trackpoint time in file = 08:25. Displayed by MM as 09:25 (correct). After global replacement = 08:25 (incorrect).

If I was doing this test late in the year (back on GMT instead of BST) then those results would be reversed.

On balance, reckon I'll stick with taking photo of a clock or my watch near the start of every walk. The combinations of walk date (winter, summer), location (UK, Europe, USA, etc) and the current PC Date/Time make it all too much of a PITA!

A wizard in MM might sort it, but I won't hold my breath.

--
Terry, East Grinstead, UK