Are you talking about changing into/out of Sabbath mode on Samsung smart appliances?
If so, there is a way to do it, using the rules API. Essentially, you have to create a bit of code to do it and add that to your account.
Sabbath Mode to be Added to Routines Update - #16 by Menachem_Fromer
If you’re interested in that, other people will have to explain how to use the rules API.
If instead, you’re looking for a way to use a calendar trigger to do multiple things with other devices connected to your SmartThings account because it’s almost Shabbat, A different community member has written an endpoint smart app which can do that. You’ll find discussion of that plus some other options in the following topic