Checked my old Magellan GPS and it is affected by the date and time problem. When it starts, the time will reset to 12:00 am even though it is set to auto update the time. But it is still accurate, location wise.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock