The analysis process is as follows:

May 20 17 10 to April 25, 20 18, with:

365-9-5=35 1 day.

35 1÷7=50 weeks ........... 1 day.

The 8th day from Wednesday,15th day, ..., 7n+ 1 day, or Wednesday.

So, Wednesday, April 25th, 20 18.

Extended data:

Size of the month in the solar calendar:

4, 6, 9, 1 1 refers to 30 days of abortion, 1, 3, 5, 7, 8, 10, 12 refers to 3 months1day, and the average year is 28 days.

The average solar calendar year is divided into twelve months, the first month is 3 1 day, the 30th and 28th of February. The average calendar month is approximately equal to the average length of Wang Shuoyue (29.5306 days).

The size of the months in the solar calendar is regular. Before July, a single month was a big month and two months was a small month. After August, two months are big months and a single month is small, so 1 month, March, May, July, August,1month,1February are big months, and April, June, September,1/kloc.