Memorize by formula:
Party A, Party B and Party C are the first, and Party B and Party E are the first.
Propylene glycol is used while butyl nonyl flows.
The icing on the cake is five tigers walking.
The Five Tigers are talking about silver moon. For example, this year is the last year of B and the beginning of the Reform Movement of 1898, so this year's silver moon Tiangan is Wuyin, February is Jimao, March is Chen Geng, April is Xinsi and so on.
For example, last year was February, with Jia, Ji and C as the first, then the first month was Bing Yin, and February was Ding Mao, and so on.