| Oak Brook Algood | Central Time | 00:00 |
| Oak Brook Kaveripakkam | India Standard Time | -10:30 |
| Oak Brook Alhos Vedros | Western European Time | -06:00 |
| Oak Brook Nakahara Ward | Japan Time | -14:00 |
| Oak Brook Alhandra | Western European Time | -06:00 |
| Oak Brook Kawartha Lakes | Eastern Time | -01:00 |
| Oak Brook Arden | Eastern Time | -01:00 |
| Oak Brook Kawarau Falls | New Zealand Time | -17:00 |
| Oak Brook Ardross | Western Australia Time | -13:00 |
| Oak Brook Köniz | Central European Time | -07:00 |
| Oak Brook Ardsley | Eastern Time | -01:00 |
| Oak Brook Konnunsuo | Eastern European Time | -08:00 |
| Oak Brook Åre | Central European Time | -07:00 |
| Oak Brook Konolfingen | Central European Time | -07:00 |
| Oak Brook Arcugnano | Central European Time | -07:00 |
| Oak Brook Kayathar | India Standard Time | -10:30 |
| Oak Brook Argenbühl | Central European Time | -07:00 |
| Oak Brook Kayamkulam | India Standard Time | -10:30 |
| Oak Brook Argent-sur-Sauldre | Central European Time | -07:00 |
| Oak Brook Königsleiten | Central European Time | -07:00 |
| Oak Brook Balmain | Eastern Australia Time | -15:00 |
| Oak Brook Koratty | India Standard Time | -10:30 |
| Oak Brook Ballydehob | Ireland Time | -06:00 |
| Oak Brook Korčula | Central European Time | -07:00 |
| Oak Brook Ballsbridge | Ireland Time | -06:00 |
| Oak Brook Koppa | India Standard Time | -10:30 |
| Oak Brook Ballston Spa | Eastern Time | -01:00 |
| Oak Brook Ballina | Eastern Australia Time | -15:00 |
| Oak Brook Ballarat Central | Eastern Australia Time | -15:00 |
| Oak Brook Arncliffe | Eastern Australia Time | -15:00 |
| Oak Brook Arnedo | Central European Time | -07:00 |
| Oak Brook Arpora | India Standard Time | -10:30 |
| Oak Brook Arossim | India Standard Time | -10:30 |
| Oak Brook Ariana | Central European Time | -06:00 |
| Oak Brook Arlesheim | Central European Time | -07:00 |
| Oak Brook Arklow | Ireland Time | -06:00 |
| Oak Brook Arkula | India Standard Time | -10:30 |
| Oak Brook Armstrong | Pacific Time | 02:00 |