jholiday.py 文件源码

def _vernal_equinox(y):
    """???????????????????3???????????
"""
    if y <= 1947:
        d = 0
    elif y <= 1979:
        d = math.floor(
            20.8357 + 0.242194 * (y - 1980) - math.floor((y - 1980) / 4))
    elif y <= 2099:
        d = math.floor(
            20.8431 + 0.242194 * (y - 1980) - math.floor((y - 1980) / 4))
    elif y <= 2150:
        d = math.floor(
            21.8510 + 0.242194 * (y - 1980) - math.floor((y - 1980) / 4))
    else:
        d = 99

    return d