I was wondering if there is any way to keep the internal RTC clock of the TinyScreen+ to keep the time and date while the TinyScreen+ is off. My TinyScreen+ has a battery on it, so ideally the battery would keep the RTC going.

This tutorial may not directly do what you want, but it has all the parts that will help you accomplish your project goal: https://tinycircuits.com/blogs/learn/tinyscreen-external-interrupt-sleep-mode

Thank you! I actually did not know that there was a tutorial on that subject. Thank you very much!