tempranova

This plugin requires Bootstrap, and makes use of the Bootstrap Datepicker at https://eternicode.github.io/bootstrap-datepicker/.
This plugin creates a search area above comments on any post or page. Here, users can choose to enter a search term, enter a date range, or select an option of the recent past (Today, This Week, This Month) from a dropdown. They can also combine these options to search for terms within a certain time period. Please note, a selected “recent past” option will override a date range entered by the user.
The search uses AJAX to query your database for matching comments, and returns all of the relevant results in the comment area.
A term search searches both author names and comment content.

Comment Filtering

This plugin creates a Bootstrap interface that allows users to search within your comments by a search term, a date range, or the recent past.

Vinod Dalvi

Publish Date DatePicker adds interactive calendar in publish section of post, page & custom post.
It makes adding and changing date easier by selecting it from interactive calendar using mouse.

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Publish Date DatePicker

Adds Interactive Calendar in Publish Section of Post, Page & Custom Post.

Comment Filtering vs Publish Date DatePicker