No matter if you are religious or not, the idea of taking a day of rest is very important.
Just as sleep gives your brain time to process what has happened and file away memories, a day of rest gives you time to process all that is happening while conscious. You can think about other things, giving your thoughts a rest from the things you are struggling with, relationships, think through problems that need a solution, or items undone.
For many, me included, Sunday isn't that day, but that doesn't mean you should give up on a Sabbath day. Mine is scheduled into my calendar as from noon on Thursday to noon on Friday. Both the Jewish and Muslim tradition is sunset to sunset. It doesn't have to be on one calendar day.
So I with you all a wonderful day of rest and if this isn't going to be your rest day, I hope you are looking forward to your day of rest coming up through the week.