如何减去年数？

from datetime import datetime, timedelta

def subtract_years(years):
    current_date = datetime.now()
    subtracted_date = current_date - timedelta(days=years*365)
    return subtracted_date

# 示例调用
years_to_subtract = 5
result = subtract_years(years_to_subtract)
print("减去{}年后的日期是：{}".format(years_to_subtract, result.strftime("%Y-%m-%d")))