https://en-gb.wordpress.org/plugins/countdown-timer-ultimate/

I think this one is best, although some options require the pro version, at least colors can be configured.

Does not do years or months!

For pro version see – https://www.wponlinesupport.com/pricing/

https://wordpress.org/plugins/countdown-builder/

Currently disabled as it conflicts with the above one. Go to Plugins and activate Countdown builder and deactivate Countdown Timer Ultimate

Similar to the above, possibly more features, not so easy to use, requires the pro version for many features including colors.

Does not work so well with different browser widths

https://wordpress.org/plugins/wordpress-countdown-widget/

Simple, shortcode based, not many options, just the one diaply type.

[countdown date="5 June 2022" format="dHMS" hour="18" minutes="54"]

https://wordpress.org/plugins/wordpress-countdown-widget/

Does not work well wityh page builder as it has it’s own wizard for shortcodes, but is hidden.

[wpdevart_countdown text_for_day=”Days” text_for_hour=”Hours” text_for_minut=”Minutes” text_for_second=”Seconds” countdown_end_type=”time” font_color=”#333333″ hide_on_mobile=”show” redirect_url=”” end_date=”02-06-2021 23:59″ start_time=”1622639494″ end_time=”47,1,1″ action_end_time=”hide” content_position=”center” top_ditance=”10″ bottom_distance=”10″ ][/wpdevart_countdown]