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During the phone tutorial, call Janus.  You should end up going on a date with him.
After that ends, give Hugo a call once.
Then call Janus again.  The game should offer you the option to skip to Halloween day, and you're all set!

what phone tutorial?

In the most up-to-date version of the game, it appears after the main story's "to be continued..." screen.  Takes a second or two to appear after the scene goes black.