第一直覺，有點不信，為啥是千年一遇的對稱日，廢話不多說，代碼來驗證！
month_day = {'01': 31, '02': 28, '03':31, '04':30, '05':31, '06':30, '07':31, '08':31, '09':30, '10':31, '11':30, '12':31}
all_m_d = []
for mon, days in month_day.items():
for day in range(1, days+1):
temp = str(mon) + '{:0>2}'.format(str(day))
all_m_d.append(temp)
for i in range(1949, 3000):
year = str(i)
if year[::-1] in all_m_d:
print(year+year[::-1])
結果如下：
20011002 20100102 20111102 20200202 20211202 20300302 20400402 20500502 20600602 20700702 20800802 20900902 21011012 21100112 21111112 21200212 21211212 21300312 21400412 21500512 21600612 21700712 21800812 21900912 22011022 22100122 22111122 22200222 22211222 22300322 22400422 22500522 22600622 22700722 22800822 22900922
觀察后發現，千年對稱日？？明年就有好吧（20211202）！
再猜測：是不是 兩個數字組成的對稱日，千年才有一次？
驗證如下：
month_day = {'01': 31, '02': 28, '03':31, '04':30, '05':31, '06':30, '07':31, '08':31, '09':30, '10':31, '11':30, '12':31}
all_m_d = []
for mon, days in month_day.items():
for day in range(1, days+1):
temp = str(mon) + '{:0>2}'.format(str(day))
all_m_d.append(temp)
for i in range(1949, 5000):
year = str(i)
if year[::-1] in all_m_d:
y_m_d = year+year[::-1]
if len(set(y_m_d)) == 2:
print(y_m_d)
結果如下：
20200202
21111112
21211212
22111122
22200222
22211222
30300303
31111113
40400404
41111114
2111 - 2020 = 91
也不是！！這才隔了91年！
總結：
面對媒體的言論，要保持理智清醒的頭腦！
謝謝看官，溜了溜了