Any of the days work. Wednesday through Friday I'm good from one hour Malaysian time (9 am CST) to two hours before American time (5 pm CST), but can stretch a bit in either direction. On Saturday, I'm good from Malaysian time, to around the same time in the evening. On Sunday I'm good from three hours after European time (3 pm CST) to the same time at night. Unlike the other two days, I absolutely can't go earlier on Sunday.