Hello,

there are specific centers which are hot spot for exam centers. You can visit those organizations which provides this facility. have a talk with them and ask for informing if there is any opening. Share your qualification and experience untill know.

they will surely contact you as they get any opening. It is not necessary that tests will be conducted on sundays only. Mostly exam are conducted but not all so you have to make all those clear with the organization.

Hope it helps!