A cybersabbath is whenever you take time off deliberately from your electronic communications. They are the source of great renewal of inner power.
Try it. Make it a conscious, even a spiritual choice. That will make all the difference in how you return: refreshed and powerfully able to respond is what we are aiming for.
I take them often. Even more so now. They can be short or long, on Friday, Saturday, Sunday or anytime you choose. You can dedicate the time to a focus or simply Be. You make the rules. Then observe them with love for yourself and all beings.