| Helsinki Abingdon | Eastern Time | 07:00 |
| Helsinki Abington | Eastern Time | 07:00 |
| Helsinki Aberdeen | Central Time | 08:00 |
| Helsinki Abeibara | Greenwich Mean Time | 03:00 |
| Helsinki Abbotsford | Eastern Australia Time | -07:00 |
| Helsinki Alexandria Bay | Eastern Time | 07:00 |
| Helsinki Alfonso Lista | Philippine Time | -05:00 |
| Helsinki Alfornelos | Western European Time | 02:00 |
| Helsinki Alger Centre | Central European Time | 02:00 |
| Helsinki Algerias | Colombia Time | 08:00 |
| Helsinki Algermissen | Central European Time | 01:00 |
| Helsinki Algiers | South Africa Standard Time | 01:00 |
| Helsinki Algoma | Central Time | 08:00 |
| Helsinki Algood | Central Time | 08:00 |
| Helsinki Alhos Vedros | Western European Time | 02:00 |
| Helsinki Alhandra | Western European Time | 02:00 |
| Helsinki Arden | Eastern Time | 07:00 |
| Helsinki Ardross | Western Australia Time | -05:00 |
| Helsinki Ardsley | Eastern Time | 07:00 |
| Helsinki Åre | Central European Time | 01:00 |
| Helsinki Arcugnano | Central European Time | 01:00 |
| Helsinki Argenbühl | Central European Time | 01:00 |
| Helsinki Argent-sur-Sauldre | Central European Time | 01:00 |
| Helsinki Balmain | Eastern Australia Time | -07:00 |
| Helsinki Ballydehob | Ireland Time | 02:00 |
| Helsinki Ballsbridge | Ireland Time | 02:00 |
| Helsinki Ballston Spa | Eastern Time | 07:00 |
| Helsinki Ballina | Eastern Australia Time | -07:00 |
| Helsinki Ballarat Central | Eastern Australia Time | -07:00 |
| Helsinki Arncliffe | Eastern Australia Time | -07:00 |
| Helsinki Arnedo | Central European Time | 01:00 |
| Helsinki Arpora | India Standard Time | -02:30 |
| Helsinki Arossim | India Standard Time | -02:30 |
| Helsinki Ariana | Central European Time | 02:00 |
| Helsinki Arlesheim | Central European Time | 01:00 |
| Helsinki Arklow | Ireland Time | 02:00 |
| Helsinki Arkula | India Standard Time | -02:30 |
| Helsinki Armstrong | Pacific Time | 10:00 |