24-hour prayer: For the 23rd annual World Day of Prayer, an international meditation event, attendees will be able to participate in a 24-hour prayer vigil or for any length of time desired. Free and open to all, the vigil will begin with a short opening service at 7:30 p.m. Sept. 7 and end with another service at 7:30 p.m. Sept. 8. at Unity North Atlanta. Information: 4255 Sandy Plains Road, Marietta. 678-819-9100, www.unitynorth.org.

Blood drive: During Power in the Blood, a blood drive event hosted by the American Red Cross, community members will be able to donate blood from 7:30 a.m.-12:30 p.m. Sept. 10 and 8 a.m.-2 p.m. Sept. 11 at New Birth Missionary Baptist Church. Donors will need to present identification; donors will also receive a free gift. To schedule an appointment to donate blood, call the church's Member Care Ministry or visit www.redcrossblood.org and enter access code NBMB. Information: 6400 Woodrow Road, Lithonia. 770-696-9600, www.newbirth.org.

Health festival: Taste of Shiloh, a health fair celebrating its 10th anniversary, will feature free health screenings, free healthy food samples, free massages, interactive seminars and demos, a blood drive, prizes, giveaways and more from 10 a.m.-4 p.m. Sept. 11 at Shiloh Seventh-day Adventist Church. This event is free and open to all. For additional details about the event, visit www.tasteofshiloh.com. Information: 810 Church St., Smyrna. 770-434-4548, www.sdashiloh.org.

Lunchtime learning: Join Jennifer Singer, who will speak about the topic "Life in Krakow, Poland" during a lunch and learn session from 12-1:30 p.m. Sept. 21 at the Marcus Jewish Community Center of Atlanta. This event is free and open to the public. Registration is required. Additionally, prepaid box lunches are available for people who RSVP. Information: 5342 Tilly Mill Road, Dunwoody. 678-812-4002, www.atlantajcc.org.

Of note: A support group for divorced people will be held at 9:45 a.m. Sept. 11 at Roswell Counseling Center (717 Mimosa Blvd., Roswell). Doyle R. Hamilton, the pastoral counselor, will lead the group. The counseling is free, ongoing and open to all, but RSVP is requested via doyle@fbroswell.org.

Have an event you’d like to publicize? Send an email with all event details, a contact phone number and photo (if available) in the body to: ajcfaithcalendar@gmail.com. You can also post your event at www.ajc.com/calendars.