Dont worry about running out of time to grind (even though you NEVER NEED TO GRIND). The final day doesnt end until you beat the last boss, and your party members dont get tired on the final day, so you can just go up and down tartar sauce as much as you like
Ah thanks! I'm glad I know that, now I can just plow through to the end
Yeah I know you don't NEED to grind, it's more that I didn't want to end up on the end boss and struggling with it without being able to grind if I needed to