https://switchwp.com/plugins/wp-client-reports/

The perfect plugin for agencies and site maintainers who regularly update WordPress and it's themes and plugins on a weekly, monthly, or quarterly basis. The plugin tracks what daily updates have happened and records them.You can use the beautiful reporting page to show what updates have happened within a certain amount of time such as last month, this month, or last 30 days.Send an HTML email with update statistics whenever you complete updates to show the value of your work to your client or other site stakeholders.

Changelog

= 1.0.16 =

* Fixed timezone issues