ComicHelper.py 文件源码

def date_to_jd(year,month,day):
    if month == 1 or month == 2:
        yearp = year - 1
        monthp = month + 12
    else:
        yearp = year
        monthp = month
    # this checks where we are in relation to October 15, 1582, the beginning
    # of the Gregorian calendar.
    if ((year < 1582) or
        (year == 1582 and month < 10) or
        (year == 1582 and month == 10 and day < 15)):
        # before start of Gregorian calendar
        B = 0
    else:
        # after start of Gregorian calendar
        A = math.trunc(yearp / 100.)
        B = 2 - A + math.trunc(A / 4.)
    if yearp < 0:
        C = math.trunc((365.25 * yearp) - 0.75)
    else:
        C = math.trunc(365.25 * yearp)

    D = math.trunc(30.6001 * (monthp + 1))

    jd = B + C + D + day + 1720994.5
    return jd

# Function from:  https://gist.github.com/jiffyclub/1294443