Idea: Set the countdown's end date instead of the start date

Hello,
if you want your website to be in maintenance mode until a decent day in the future, it is quite hard to achieve this in the configuration because the within the configuration the date and entered values are not updating as time is progressing. This results in the countdown starting from scratch every time you update something in the configuration. So if you like to have a fixed time in the future you want your website be available again, you always have to reset the configuration. I guess the more common use case would be to set a date and time in future and then let the plugin determin by itself how many days, hours and so on there are left until the set point is reached. I would really like to see what you are thinking of this idea. Thanks for your feedback which is really appreciated.
Best regards,
Matthias

No file, test, or entry point is named. Start by locating the maintenance-mode configuration and countdown implementation, then trace how the current start date is stored and displayed. Done means a future end date can be configured once and the countdown continuously reflects the remaining time without resetting after configuration changes.