VueMinder Lite v2020.03

VueMinder Lite is a calendar application for Windows to help you stay organized in life.

This free (for commercial and personal use) version is only a Lite version so it doesn't have all the bells and whistles of the paid versions, but it still allows you to plan by day, week and month on your Calendar.

You can add holidays and events, attach links to events, contact and other data items. You can categorize events and even save calendar as HTML.

Worth a look if you need a planner.