Learn a new skill on Informatic, Innovation, Teaching, Health and music field. Coursera has published 21 courses which you can accomplished in less than 1 day.
You can get the free certificate if you finish the course before January 31st 2021. If you finish it later, the content will be still available but without the certificate option.
Here is it the list.
Business
Health
Technology
Education
Powerful Tools for Teaching and Learning: Digital Storytelling
Making Sense of the News: News Literacy Lessons for Digital Citizens