The Ranger date/time is automatically synchronized to a Global Time Server when connected to the internet via WiFi.
If the Ranger date/time is incorrect because it hasnt been connected to the internet for a long time then set the date/time by connecting it to the internet via WiFi (see Connect Ranger to WiFi guide).
Once the Ranger has successfully connected to a WiFi network with internet access, turn it off and then back on. Wait 30s and you will see the date/time change to the correct values on the reading screen.
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