I want to create a archive calendar into sidebar exactly like this site http://www.daily-sun.com/
I don't know they are using plugins or custom coding.
please anyone give me suggestion how to create this.
Thanks in advance, Sujana
They're not using WordPress, so whether they're using a plugin for their specific CMS or not is a moot point.
However, WordPress already includes a calendar widget for the sidebar. And there are several plugins in the repository that do the same: Calendar archive widgets.
You will need to pick one and modify your site's stylesheet (