Ridgefield residents may give blood at the rec center, 125 Danbury Road, Thursday, Oct. 18, from 1:30 to 6:30 p.m. Ridgefield Supply, 29 Prospect Street, will also host a blood drive two days later — on Saturday, Oct. 20 — from 9 a.m. to 2 p.m.

Appointments may be scheduled by downloading the free Red Cross blood donor app, visiting redcrossblood.org or calling 1-800-Red Cross (1-800-733-2767).