Here are the steps to get a month from Date Time column In SharePoint 2013 List:
Go to your SharePoint list.
Here I have got a month from DOB column. Click Create Column from the top ribbon.
The following popup will appear.
Enter column name (Month) and select calculated column.
Paste the following code to Formula field.
=TEXT(DOB,"mmmm") Here I have got a month from DOB date time column.
Click Ok button. The results will be as in the following screenshot:
Get a month in number:
Go to list settings, then click Month under Columns menu.
Change the formula by the following.
=TEXT(DOB,"mm"). Click Ok button. The results will be as in the following screenshot:
Get a month in text: Change the formula by the following in Month column.
=TEXT(DOB,"mmm"). Click Ok button. The results will be shown as in the following screenshot:
The results will be as in the following screenshot:
Summary
In this article we saw how to get a month only from the date time column using calculation field in SharePoint 2013 list.