TRAVERSE CITY, MI -- Wednesday kicked off Michigan Blood's seventh annual Hospital Holiday Challenge.

During the event, Western Michigan hospitals join in a spirited competition to see which hospital can achieve the highest increase in donors over last year's donor sign-in.

Last year, Spectrum Health-Butterworth Hospital won by registering more than double the number of donors signed in the previous year.

Drives are scheduled through January 7; the winner of the Hospital Holiday Challenge will be announced the second week of January. 

You can find out how to donate by visiting Michigan Blood online.