CHICAGO (CBS) — The American Red Cross is hoping to boost inventory, in what is a typically slow period.

The cold, winter months and flu season can make it more challenging for people to come out and donate blood.

READ MORE: SWAT Team Dispatched After Man Barricades Himself In Home On Halsted Street In Lincoln Park

According to the American Red Cross, blood donations tend to decline at this time of year.

So, they’re holding something special in an attempt to encourage donations.

READ MORE: LOCATED: Matthew La Luz, 32, Last Seen In Rogers Park

It’s the Great Chicago Blood Drive and it takes place Monday at two locations. Downtown at the Hyatt Regency Hotel (7 a.m.-6 p.m.) and in Oak Brook at the Drake Hotel (8 a.m.- 6 p.m.).

Anyone age 17 and older, weighing at least 110 pounds can be a donor.

MORE NEWS: 4 Suspects Apprehended After Woman Is Robbed At Roosevelt Red Line Station; Police Stop Train After Robbers Escape

Walk-ins are welcome, but the Red Cross encourages donors to schedule a donation time. Visit redcrossblood.org and enter sponsor code Hyatt Regency or Drake Oak Brook depending on your preferred location.