Getting plugin de/activation time might throw an exception if option value is returned as string instead of integer.
Came across that while testing #16702 with one of the plugin PRs. Might be depending on the database configuration, as the tests pass locally. But when using the methods in a plugin the option value is returned as a string resulting in an exception:
Date format must be: YYYY-MM-DD, or 'today' or 'yesterday' or any keyword supported by the strtotime function (see http://php.net/strtotime for more information)