How to create batch files with variable

Batch face is very old, does not have many features. So I recommend you see PowerShell, you'll be able to automate a lot with it. I'm even using PowerShell to get the day of the week:

FOR /F "delims=" %%i IN ('powershell "[Int] (Get-Date).DayOfWeek"') DO set dia=%%i

What you need is a conditional command IF , which will only execute a block of commands if a condition is true:

@ECHO OFF

FOR /F "delims=" %%i IN ('powershell "[Int] (Get-Date).DayOfWeek"') DO set dia=%%i

IF %dia%==5 (
    ECHO Hoje e Sexta!
    ECHO Abrir mais duas paginas...
)

ECHO Tudo o que preciso todos os dias!

You can also use the IF-ELSE that will execute whatever is within ELSE if the condition is false:

@ECHO OFF

FOR /F "delims=" %%i IN ('powershell "[Int] (Get-Date).DayOfWeek"') DO set dia=%%i

IF %dia%==5 (
    ECHO Hoje e Sexta!
    ECHO Abrir mais duas paginas...
) ELSE (
    ECHO Hoje nao e Sexta!
    ECHO Caso que queira abrir alguma coisa...
)

ECHO Tudo o que preciso todos os dias!

And since today is Friday, the output:

The same solution with PowerShell:

First you will run PowerShell as an administrator and enter the command

Set-ExecutionPolicy Unrestricted

This will allow you to run the scripts on your computer.

Then you will open the Windows PowerShell ISE , an editor that comes in windows for scripts:

And the code is:

$dia = [Int] (Get-Date).DayOfWeek
if ($dia -eq 5) {
    Start "https://www.google.com/search?q=happy%20hour%20promoção"
} else {
    Start "https://jornaldoempreendedor.com.br/destaques/10-dicas-para-relaxar-seu-cerebro-enquanto-trabalha/"
}
Start "http://fazenda.gov.br"

Greenlittlegirlrunstotest,savesinoneplaceandtorunjustusetherightbuttonandkeeprunningasPowerShell