Hi @epicsmokey , The difference between both function is below:
The Now function returns the current date and time as a date/time value.
The Today function returns the current date as a date/time value. The time portion is midnight. Today has the same value throughout a day, from midnight today to midnight tomorrow.
Now, for the PowerApps Language and time setting you can check this way:

You also need to consider the Site setting for SP site:


-----------------------------------------------------------------------------------------------------------------------------
I hope this helps.
Please click Accept as solution ✅ if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs up.👍
Thanks,
ANB