I've been reporting on Sony PlayStation hacking news since 2000 and started PSXHAX in 2014 to cover PlayStation (PSX), PlayStation 2 (PS2), PlayStation 3 (PS3), PlayStation 4 (PS4), PlayStation Portable (PSP), PlayStation Vita (PS Vita), PlayStation TV (PS TV) and ...
your save file is going to have that future time. Then it auto-uploads. Then if you move the time back to the correct time and do some more stuff, then when the PS5 auto-syncs next it might download the "more current" save file from online?