To save you all some pain, I thought I would share this. https://discordapp.com/channels/686053708261228577/694233507500916796/859440547528835113
I recently got a new computer and now all my “create dates” are of the day the files synced to the new computer. Here is a screenshot showing the modification date BEFORE the create date:
After chatting in discord, it sounds like this is also the case with dropbox. I tested google drive and it seems to preserve create date, but has lag issues: Lag with Google Drive - Don't use if you hate lag :)