5 days is possible, and has been done before, but how about 4 days?I think it is not possible, because to beat the game, you have to go to these places, which cannot be gotten to without a 1 day travel time:
- Mire of Damned - for memory crystal
- Eel Infested Water - for memory crystal
- Kriegspire - for several required quests
- Hermit's Isle - for memory crystal (the portal to Free Haven Sewers require activation from Hermit isle side)
- Sweet Water - for final quest
Since you must go to these places, the earliest you can win is January 6 (Jan 1 + 5 days), so it would seem like finishing on Jan 5 is impossible.
Or am I missing something?