Hello Georgi Ivanov,
You can create a change microflow for both your start and end dates.
In your Microflow Logic
ATB!!
Hi Georgi,
You can check the day of the week using this statement: parseInteger(formatDateTime($Date, 'u')) (See this topic for more information: Mendix Community - Question Details)
You can then throw an error or a validation feedback if a weekend day is selected.
Best regards,
Martijn