It may happen that as an administrator you have added a new holiday for your company with its own description. When you want to save, the message "Something went wrong while saving the public holidays schedule. Please contact our support".
What can you do?
It is possible that there are too many characters in the field of name/description of the added holiday.
The names of the self-created holidays are too long and should be max 50 characters per field. In this case you need to change the name to max. 50 characters. If all goes well, you can then successfully save the holiday(s).