I want to disable the number of articles today in home page.How can I do that?

Hello Vamsi !
To remove the number of articles today in home page, you can do as the following:
1. Install the Jetpack by WordPress.com plugin.
2. Setting Jetpack then enable the Custom CSS feature.
3. Move through Appearance > Editor Css, add the following code:

  .desktop .top-news .number {
    display: none;
}
.desktop .top-news .number + span {
     font-size: 11px;
    padding-top: 12px;
}

Hope this helps !