| Jefferson Mollerussa | Central European Time | -06:00 |
| Jefferson Enderby | Pacific Time | 03:00 |
| Jefferson Mollis | Central European Time | -06:00 |
| Jefferson Monastero Bormida | Central European Time | -06:00 |
| Jefferson Monastier di Treviso | Central European Time | -06:00 |
| Jefferson Mokpo-si | Korean Time | -13:00 |
| Jefferson Mollem | India Standard Time | -09:30 |
| Jefferson Monreal del Campo | Central European Time | -06:00 |
| Jefferson Monona | Central Time | 01:00 |
| Jefferson Monkton | Eastern Time | 00:00 |
| Jefferson Monmouth | Central Time | 01:00 |
| Jefferson Moniga del Garda | Central European Time | -06:00 |
| Jefferson Monguelfo-Tesido | Central European Time | -06:00 |
| Jefferson Mönchengladbach | Central European Time | -06:00 |
| Jefferson Monchique | Western European Time | -05:00 |
| Jefferson Makarska | Central European Time | -06:00 |
| Jefferson Makawao | Hawaii-Aleutian Time | 06:00 |
| Jefferson Maketu | New Zealand Time | -16:00 |
| Jefferson Matraville | Eastern Australia Time | -14:00 |
| Jefferson Matinhos | Brasilia Time | -01:00 |
| Jefferson Matheran | India Standard Time | -09:30 |
| Jefferson Matawan | Eastern Time | 00:00 |
| Jefferson Matarbari | Bangladesh Time | -10:00 |
| Jefferson Makrandpur Thakuran | India Standard Time | -09:30 |
| Jefferson Moka | Mauritius Time | -08:00 |
| Jefferson Mayfield | Central Time | 01:00 |
| Jefferson Maylands | Western Australia Time | -12:00 |
| Jefferson Mayotte | Eastern Time | 00:00 |
| Jefferson Mayville | Eastern Time | 00:00 |
| Jefferson Mayfield | Eastern Australia Time | -14:00 |
| Jefferson Mayfield | United Kingdom Time | -05:00 |
| Jefferson Mawgan | United Kingdom Time | -05:00 |
| Jefferson Mawson Lakes | Central Australia Time | -13:30 |
| Jefferson Maxey | United Kingdom Time | -05:00 |
| Jefferson Matten bei Interlaken | Central European Time | -06:00 |
| Jefferson Mavivi | Central Africa Time | -06:00 |
| Jefferson Maumee | Eastern Time | 00:00 |
| Jefferson Maude | Eastern Australia Time | -14:00 |