January 1 1970 on iPhone 6S

I woke up this morning and my iPhone 6S said it was 12:48AM. All of the clocks I looked at disagreed, and I tried to check my date and time settings. The iPhone Calendar said it was January 1, 1970. I tried a hard reset and regular power down of the phone with no progress. Trying to contact Apple Support proved inconvenient because safari wouldn't connect to any pages because the date and time settings were not set correct (I assume because the internet didn't exist in 1970). I had to manually reset the date and time for the phone in order to get safari to work.

After getting in touch with Apple Support by phone, running a diagnostic, and a 20 minute discussion with the "support rep" about what a cable WiFi hotspot was (Xfinity Public WiFi), and trying to avoid a factory reset in order to not lose all my network settings and preferences, I typed in Google "iPhone January 1, 1970" and several forum discussions came up saying it would "Brick" my phone. Concerned, I mentioned this to the Support Rep telling her that I googled it and the forums said it would brick my phone, whatever that means. The rep went on to tell me that the information was invalid because I googled it. I asked if there were any known issues with this specific date because it was strange that this happened to me and when typing it into a search engine there were several discussions about it. Before getting into an argument about what a search engine vs Google was, I asked to speak to a supervisor.

Speaking to the Supervisor, she wanted me to reset the phone. . . Sometime during the conversation, the phone righted itself. I mentioned this to the Supervisor, and she gave me a case number and her contact information telling me to "keep an eye on it".

This has never happened to me before, and most of the forum posts start out with something like "I accidentally changed the date to January 1 1970" and ending in an online argument about "why the F would you change the date. . . you are stupid. . . and so on". I am not trying to do that, just want to know if anyone has had this issue where the phone changed the date on it's own, what that could possibly mean, and is this some kind of Apple conspiracy to hack into our minds or something? Is Steve Jobs coming back from the grave to transcend himself?

All jokes aside, what I am really concerned with is whether or not my information is safe, or should I start changing passwords and protecting my personal information that I have trusted to Apple. Any helpful advice or wisdom would be appreciated.