1. Open Office Hours
Sign in to your 3CX Web Client, go to Admin, and select Office hours.
If your system uses departments, choose the department you want to manage.
2. Add a Holiday in the Office Holidays Section
In the Office hours page, scroll down to Office Holidays and click Add.
Enter the holiday name and the date (or date range), then save.
3. Repeat for Additional Dates
Repeat the Add process for each public holiday or office closure.
Your 3CX system will automatically treat those dates as closed and follow the rules set in your Office Hours configuration.