Schedule Widgets With Start and End Dates
Adds "Show from" and "Show until" date fields to every classic widget, so a promotion, event notice or holiday message appears and disappears on its own.
Snippet Library
Widgets snippets for WordPress
Snippets for widgets and sidebars: restore the classic widget screen, register new widget areas, remove default widgets and allow shortcodes in text widgets. For classic themes and sites that still lean on sidebars.