You might use it with no scruples.
You can set it to automatically adjust date so that whenever you connect your device to the WiFi your date will be corrected.
Once the firmware has been downloaded you have to select start to fix.
After the process, set up your iPad as new or set it up with a backup.
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The same process is important for all the applications that you are going to use on your device including iMessages, FaceTime and many more.