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@echo off
set yyyy=2025
set mm=12
set dd=31
>tmp.vbs echo wscript.stdout.write 1+DateDiff("y", "%yyyy%-01-01", "%yyyy%-%mm%-%dd%")
for /f %%A In ('cscript tmp.vbs //noLogo') do set doy=%%A
if exist tmp.vbs del tmp.vbs

echo %doy%

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for /f %%a in ('echo prompt $E^| cmd') do set "ESC=%%a"

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echo [2J

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echo %esc%[2J

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IF "!!" == "" (
  ECHO Delayed expansion is ON
)  ELSE (
  ECHO Delayed expansion is OFF
)