You can go to the Bull village right away, but i prefer to gain exp, gain money and solve Witer's NIghtmare Quest first.
On Day 6 we can help Witer with his Sleeping-Problem. Talk to Witer, Snow and Chet severals times: "Ask about Witer". After Witer opens up, visit Meko. Meko tells you about Witer sitting in the Basement at 3.00.
Find Witer at exactly 03:00. (I won't use "a.m" and "p.m.". Just like Imperial System; it's an outdated and inefficient tradition/writing.)
Your Hero should be at full MP. Tipp: By Leaving and re-entering the taven without leaving the area you pass 5 minutes. Wake up Witer, talk and go outside to run into a Ghost. Attack once, and Escape right after. Speakwith Meko to learn Holy Fist. Go back to the Ghost and destroy him. If you meet Witer at exactly 03:00 you can do this within a single night. GZ