| Middlesbrough Kattankulathur | India Standard Time | -04:30 |
| Middlesbrough Zuidhorn | Central European Time | -01:00 |
| Middlesbrough La Tijera | Central Time | 06:00 |
| Middlesbrough Zuidoostbeemster | Central European Time | -01:00 |
| Middlesbrough La Sénia | Central European Time | -01:00 |
| Middlesbrough Zugliano | Central European Time | -01:00 |
| Middlesbrough La Robine-sur-Galabre | Central European Time | -01:00 |
| Middlesbrough Zweisimmen | Central European Time | -01:00 |
| Middlesbrough La Roche-en-Ardenne | Central European Time | -01:00 |
| Middlesbrough Zürs | Central European Time | -01:00 |
| Middlesbrough La Punt-Chamues-ch | Central European Time | -01:00 |
| Middlesbrough Zwingenberg | Central European Time | -01:00 |
| Middlesbrough Kosova Hora | Central European Time | -01:00 |
| Middlesbrough Zwiefalten | Central European Time | -01:00 |
| Middlesbrough Košice | Central European Time | -01:00 |
| Middlesbrough Koshu | Japan Time | -08:00 |
| Middlesbrough La Pobla de Farnals | Central European Time | -01:00 |
| Middlesbrough La Perouse | Eastern Australia Time | -09:00 |
| Middlesbrough Lititz | Eastern Time | 05:00 |
| Middlesbrough Litomysl | Central European Time | -01:00 |
| Middlesbrough Little Plumstead | United Kingdom Time | 00:00 |
| Middlesbrough Little River | New Zealand Time | -11:00 |
| Middlesbrough Little River | Eastern Time | 05:00 |
| Middlesbrough Lismore | Eastern Australia Time | -09:00 |
| Middlesbrough Lisbon | Eastern Time | 05:00 |
| Middlesbrough Lisbane | United Kingdom Time | 00:00 |
| Middlesbrough Lisboa | Western European Time | 00:00 |
| Middlesbrough Lisboa | Western European Time | 00:00 |
| Middlesbrough Ladenburg | Central European Time | -01:00 |
| Middlesbrough Labrador | Eastern Australia Time | -09:00 |
| Middlesbrough Labuan | Malaysia Time | -07:00 |
| Middlesbrough Lac-Drolet | Eastern Time | 05:00 |
| Middlesbrough Lac-Mégantic | Eastern Time | 05:00 |
| Middlesbrough Laakirchen | Central European Time | -01:00 |
| Middlesbrough Labège | Central European Time | -01:00 |
| Middlesbrough Labin | Central European Time | -01:00 |
| Middlesbrough La Victoria | Colombia Time | 06:00 |
| Middlesbrough La Victoria | Peru Time | 06:00 |