Factory Calendar: T-Code-OY05/SCAL
For effective planning and scheduling it is very important that a calendar exists in the SAP ERP system. Factory calendar creation consists of three steps,
1. Define public holidays.
2. Create a holiday calendar by assigning the public and national holidays.
3. Finally create a factory calendar and the holiday calendar then gets assigned to the factory calendar.
You can assign a factory calendar during creation of the plant-OX10.
Step 1: Public Holiday.
spro-sap reference img-sap customizing implementation guide-sap netweaver-general settings-maintain calendar-OY05.

Start by clicking on the maintain calendar option an this will open relevant interface,

Next, click on “Change Mode” to create new public holidays with fixed dates.

Select the “New” button, as highlighted in your interface.

After that, click “Continue” to proceed.

Use the find feature by pressing Ctrl + F, and search for “SPL Day” which you previously created. This should display the created entry.

SPL Day – SPL Day created as Public holiday.
Step 2: Holiday Calendar
Once saved, click on the back button to return to the previous screen.

Select the “Holiday Calendar” and again click on “Change Mode.”

To create a new holiday, click “New.” A new interface will appear. Fill in all required fields as demonstrated in the below provided image.

Now, click on “Assign Holiday” to move to the next interface.

From here, select some of the public holidays, including the newly created “SPL Day,” and then click on “Assign Public Holiday” as indicated.

After assigning the holidays, remember to click the “Save” button to ensure your changes are preserved.
Navigate back to check your updates; the interface will refresh.

Now, click the “Find” button and search for “RK.” You should see the “RK – RKS Calendar” which you have established as your holiday calendar.
RK – RKS Calendar created as Holiday calendar.
Step 3: Factory Calendar

Repeat the same steps in the holiday calendar

Select the workdays that correspond with it, then click the “Save” button again

Finally, click the back button and use the “Find” feature to select “RK” once more to verify everything is in order.