| Guantánamo Milton | Eastern Australia Time | -15:00 |
| Guantánamo Millendon | Western Australia Time | -13:00 |
| Guantánamo Millwood | Eastern Time | 00:00 |
| Guantánamo Milnrow | United Kingdom Time | -05:00 |
| Guantánamo Millers Falls | Eastern Time | 00:00 |
| Guantánamo Millers Point | Eastern Australia Time | -16:00 |
| Guantánamo Millheim | Eastern Time | 00:00 |
| Guantánamo Millington | Central Time | 01:00 |
| Guantánamo Millner | Central Australia Time | -14:30 |
| Guantánamo Millswood | Central Australia Time | -15:30 |
| Guantánamo Mill Run | Eastern Time | 00:00 |
| Guantánamo Mill Valley | Pacific Time | 03:00 |
| Guantánamo Millbrook | Eastern Time | 00:00 |
| Guantánamo Millbrook | Central Time | 01:00 |
| Guantánamo Meulebeke | Central European Time | -06:00 |
| Guantánamo Mevagissey | United Kingdom Time | -05:00 |
| Guantánamo Mevalurkuppam | India Standard Time | -10:30 |
| Guantánamo Mevaseret Zion | Israel Time | -07:00 |
| Guantánamo Mexico City | Central Time | 01:00 |
| Guantánamo Metochi | Eastern European Time | -07:00 |
| Guantánamo Metrocentre | United Kingdom Time | -05:00 |
| Guantánamo Metropolis | Central Time | 01:00 |
| Guantánamo Middlebury | Eastern Time | 00:00 |
| Guantánamo Middlefield | Eastern Time | 00:00 |
| Guantánamo Middle Dural | Eastern Australia Time | -16:00 |
| Guantánamo Middlesex | Eastern Time | 00:00 |
| Guantánamo Mhow | India Standard Time | -10:30 |
| Guantánamo Miami Springs | Eastern Time | 00:00 |
| Guantánamo Miguelturra | Central European Time | -06:00 |
| Guantánamo Milford Charter Township | Eastern Time | 00:00 |
| Guantánamo Miliana | Central European Time | -06:00 |
| Guantánamo Milford on Sea | United Kingdom Time | -05:00 |
| Guantánamo Milan | Central Time | 01:00 |
| Guantánamo Milano Marittima | Central European Time | -06:00 |
| Guantánamo Mile End South | Central Australia Time | -15:30 |
| Guantánamo Midpines | Pacific Time | 03:00 |
| Guantánamo Midway | Mountain Time | 02:00 |
| Guantánamo Midway City | Pacific Time | 03:00 |
| Guantánamo Middletown | Eastern Time | 00:00 |
| Guantánamo Middleton Saint George | United Kingdom Time | -05:00 |
| Guantánamo Midland City | Central Time | 01:00 |
| Guantánamo Midlothian | Eastern Time | 00:00 |
| Guantánamo Midhurst | Eastern Time | 00:00 |
| Guantánamo Midland | Western Australia Time | -13:00 |
| Guantánamo Loni | India Standard Time | -10:30 |
| Guantánamo Longwood | Eastern Time | 00:00 |
| Guantánamo Lone Tree | Mountain Time | 02:00 |
| Guantánamo Long Beach Township | Eastern Time | 00:00 |
| Guantánamo Longford | Ireland Time | -05:00 |
| Guantánamo Long Grove | Central Time | 01:00 |