| Tangshan Levittown | Eastern Time | 13:00 |
| Tangshan Lewistown | Eastern Time | 13:00 |
| Tangshan Mahabaleshwar | India Standard Time | 02:30 |
| Tangshan Mahabalipuram | India Standard Time | 02:30 |
| Tangshan Magdalena del Mar | Peru Time | 13:00 |
| Tangshan Magill | Central Australia Time | -02:30 |
| Tangshan Mahboula | Arabian Time | 05:00 |
| Tangshan Maiden Gully | Eastern Australia Time | -03:00 |
| Tangshan Mahikeng | South Africa Standard Time | 06:00 |
| Tangshan Mahon | Central European Time | 07:00 |
| Tangshan Mae Sot | Indochina Time | 01:00 |
| Tangshan Mae Hia | Indochina Time | 01:00 |
| Tangshan Mae Na Wang | Indochina Time | 01:00 |
| Tangshan Mafra | Western European Time | 08:00 |
| Tangshan Madeirã | Western European Time | 08:00 |
| Tangshan Madeira Beach | Eastern Time | 13:00 |
| Tangshan Mackinaw | Central Time | 14:00 |
| Tangshan Macksville | Eastern Australia Time | -03:00 |
| Tangshan Macquarie | Eastern Australia Time | -03:00 |
| Tangshan Macquarie Fields | Eastern Australia Time | -03:00 |
| Tangshan Main Beach | Eastern Australia Time | -02:00 |
| Tangshan Mainbernheim | Central European Time | 07:00 |
| Tangshan Maïné-Soroa | West Africa Time | 07:00 |
| Tangshan Malaimedu | India Standard Time | 02:30 |
| Tangshan Malaga | Western Australia Time | 00:00 |
| Tangshan Maladi | India Standard Time | 02:30 |
| Tangshan Makrandpur Thakuran | India Standard Time | 02:30 |
| Tangshan Makarska | Central European Time | 07:00 |
| Tangshan Makawao | Hawaii-Aleutian Time | 18:00 |
| Tangshan Maketu | New Zealand Time | -05:00 |
| Tangshan Malton | United Kingdom Time | 08:00 |
| Tangshan Malkishua | Eastern European Time | 06:00 |
| Tangshan Mallemort | Central European Time | 07:00 |
| Tangshan Malles Venosta | Central European Time | 07:00 |
| Tangshan Malmedy | Central European Time | 07:00 |
| Tangshan Malinalco | Central Time | 14:00 |
| Tangshan Maliaño | Central European Time | 07:00 |
| Tangshan Malibu | Pacific Time | 16:00 |
| Tangshan Maleny | Eastern Australia Time | -02:00 |
| Tangshan Maldon | Eastern Australia Time | -03:00 |
| Tangshan Malalbergo | Central European Time | 07:00 |
| Tangshan Malay | Philippine Time | 00:00 |
| Tangshan Luhe-Wildenau | Central European Time | 07:00 |
| Tangshan Luisant | Central European Time | 07:00 |
| Tangshan Luján | Argentina Time | 11:00 |
| Tangshan Lunas | Malaysia Time | 00:00 |
| Tangshan Luján de Cuyo | Argentina Time | 11:00 |
| Tangshan Lutherville-Timonium | Eastern Time | 13:00 |
| Tangshan Luverne | Central Time | 14:00 |
| Tangshan Luzerne | Eastern Time | 13:00 |