So I managed to find the RTC editor that everyone recommends for RSE:
https://web.archive.org/web/20180811045454if_/http://furlocks-forest.net/wiki/uploadedfiles/rtcread.zip
Only problem is I'm not sure how to locate the timestamp of the save file. As per a reddit user's suggestion I'm just setting the RTC to my local time and date and hoping that's later than the timestamp stored.