When is the expiration date for a Canadian citizen with a B-2 visa and a sojourn period of 6 months, who has entered Korea on Feb.15, 2004?

The day of entry is not included in the sojourn period, so that the period of sojourn is counted from the following day until the expiration day. If the day of expiration is a national holiday, then the next day is the expiration day. So in this case, the expiration day would be Aug.15, 2004. But since it is a national Korean holiday (Liberation Day), the expiration day would be on Aug.16.