Hi Pres
Have you tried doing it from the TIME option? The date's displayed there too, so you might be able to cursor down and change the date.
Geko 101 manual
You don't correct the date - the Gecko (and any gps) receives its time and date information in the signals from the satellites. So if you let it lock on and find it's position you should find that the date has set itself anyway.
The time menu option only lets you set a time zone offset from GMT.
(I've got a Geko 201 - very similar)
I don't think you can backup the data on a Geko 101 - I don't see how it interfaces to any backup medium as it's the version without a PC connection - you need the 201 or 301 for that.
I'd forgotten about the master reset, but it's got to be worth a try. Back at the start of the year there was a general problem with dates and times on the 201 (which caused them to locate very slowly, and caused problems with saved tracks, etc) - it was eventually cured by a software update from Garmin. I hope the 101 isn't having a similar problem because I don't know how you'd update the software!
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