| Rosario Levittown | Eastern Time | 02:00 |
| Rosario Lewistown | Eastern Time | 02:00 |
| Rosario Mahabaleshwar | India Standard Time | -08:30 |
| Rosario Mahabalipuram | India Standard Time | -08:30 |
| Rosario Magdalena del Mar | Peru Time | 02:00 |
| Rosario Magill | Central Australia Time | -13:30 |
| Rosario Mahboula | Arabian Time | -06:00 |
| Rosario Maiden Gully | Eastern Australia Time | -14:00 |
| Rosario Mahikeng | South Africa Standard Time | -05:00 |
| Rosario Mahon | Central European Time | -04:00 |
| Rosario Mae Sot | Indochina Time | -10:00 |
| Rosario Mae Hia | Indochina Time | -10:00 |
| Rosario Mae Na Wang | Indochina Time | -10:00 |
| Rosario Mafra | Western European Time | -03:00 |
| Rosario Madeirã | Western European Time | -03:00 |
| Rosario Madeira Beach | Eastern Time | 02:00 |
| Rosario Mackinaw | Central Time | 03:00 |
| Rosario Macksville | Eastern Australia Time | -14:00 |
| Rosario Macquarie | Eastern Australia Time | -14:00 |
| Rosario Macquarie Fields | Eastern Australia Time | -14:00 |
| Rosario Main Beach | Eastern Australia Time | -13:00 |
| Rosario Mainbernheim | Central European Time | -04:00 |
| Rosario Maïné-Soroa | West Africa Time | -04:00 |
| Rosario Malaimedu | India Standard Time | -08:30 |
| Rosario Malaga | Western Australia Time | -11:00 |
| Rosario Maladi | India Standard Time | -08:30 |
| Rosario Makrandpur Thakuran | India Standard Time | -08:30 |
| Rosario Makarska | Central European Time | -04:00 |
| Rosario Makawao | Hawaii-Aleutian Time | 07:00 |
| Rosario Maketu | New Zealand Time | -16:00 |
| Rosario Malton | United Kingdom Time | -03:00 |
| Rosario Malkishua | Eastern European Time | -05:00 |
| Rosario Mallemort | Central European Time | -04:00 |
| Rosario Malles Venosta | Central European Time | -04:00 |
| Rosario Malmedy | Central European Time | -04:00 |
| Rosario Malinalco | Central Time | 03:00 |
| Rosario Maliaño | Central European Time | -04:00 |
| Rosario Malibu | Pacific Time | 05:00 |
| Rosario Maleny | Eastern Australia Time | -13:00 |
| Rosario Maldon | Eastern Australia Time | -14:00 |
| Rosario Malalbergo | Central European Time | -04:00 |
| Rosario Malay | Philippine Time | -11:00 |
| Rosario Luhe-Wildenau | Central European Time | -04:00 |
| Rosario Luisant | Central European Time | -04:00 |
| Rosario Luján | Argentina Time | 00:00 |
| Rosario Lunas | Malaysia Time | -11:00 |
| Rosario Luján de Cuyo | Argentina Time | 00:00 |
| Rosario Lutherville-Timonium | Eastern Time | 02:00 |
| Rosario Luverne | Central Time | 03:00 |
| Rosario Luzerne | Eastern Time | 02:00 |