from workalendar.asia import SouthKorea

def get_previous_business_day(date):
    cal = SouthKorea()
    prev_business_day = cal.get_previous_working_day(date)
    return prev_business_day

def get_next_business_day(date):
    cal = SouthKorea()
    next_business_day = cal.get_next_working_day(date)
    return next_business_day

# 특정 날짜의 이전 영업일 계산
date = datetime.date(2022, 1, 5)
prev_business_day = get_previous_business_day(date)
print("이전 영업일:", prev_business_day)

# 특정 날짜의 다음 영업일 계산
date = datetime.date(2022, 1, 5)
next_business_day = get_next_business_day(date)
print("다음 영업일:", next_business_day)