if it’s not a repeated occurrence and you’re calling in sick, you’re in the clear

Also non sick related, if you know you are not able to make a shift because of various plans you have to find coverage in advance or tell your manager in enough advanced to help find coverage.
Example: calling out the day of because you had an event you didn’t request off for would not be considered a valid call out reason. But partnering with your sm and finding coverage will help