>>87
set /a d=20221201
set /a f=10000,g=100,h=8869,i=69,j=278803
set /a "n=d-1,n-=!(n%%f-g)*h,c=n/f"
set /a "a=j-!(c%%4)+!(c%%100)-!(c%%400)<<6"
set /a "n-=!(n%%g)*(i+(a>>(n%%f/g)*2&3))"
echo %n%