Mac help going back a day?

I play on Mac, and I'm trying to go back a day. I did the thing where you trash the SaveGameInfo folder, and rename the SaveGameInfo_old to SaveGameInfo, and in the farm load screen, looked like it worked. It displayed the say before, Spring 18, but when I entered the save, it was Spring 19 again! I don't know what I did wrong, if anyone could help?
 

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