Due to the ten bit week format of the GPS standard there will some issues with "rollover" on April 6th, 2019. Many devices will already be prepared for it but others might display errors ranging from displaying the incorrect time to displaying the wrong location. If you're using GPS for something critical you should make sure your device is up to date. Here's a link where you look up your device. I must note that I'm not qualified to testify to the veracity of their answer but it's a good place to start.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman