How to Define Time Validator before execution of workflow for Maintaince window

Hello ,

I wanted to define the Date & time validator in workflow which will check time of server before executing next steps in Workflow and if that time is in between maintaince window time , workflow terminate else proceeds.

I could able to fetch time of local server in timestamp form using getCurrentTime() method but i am not able to define a logic to define maintaince time duration and then validate it with current time.

Please help me to get this logic created.

thanks in Advance

Br,

MG