I need to show only one time, no need of start and end time. Or I need to show only start time. Please anyone help me on this.
You can change in the field setting
Go to your content type, Now when we add a field of Date type. Then it will show a section for start and end date mentioned in the image
For already added field, you can not edit it i think because there is already content with end date. You can hide it if neccessary
Hope it will help!