Garmin just released an update to fix the wrong date as a result of the GPS WNRO on April 7th earlier this year.

Don't know the version number, but can be installed using Garmin Express or WebUpdater:

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Hopefully, someone will make the GCD files available.

treysis Reviewed by treysis on 4th June 2019. WNRO update for Zumo 660 available now! Garmin just released an update to fix the wrong date as a result of the GPS WNRO on April 7th earlier this year. Don't know the version number, but can be installed using Garmin Express or WebUpdater: Garmin Express | Register, Update Software & Sync Your Device (https://www.garmin.com/en-US/software/express/) Garmin | WebUpdater (https://www8.garmin.com/products/webupdater/howtoinstall.jsp) Hopefully, someone will make the GCD files available. Rating: 5