| Markham Saint-Marcel-Campes | Central European Time | -06:00 |
| Markham Saint Margrethen | Central European Time | -06:00 |
| Markham Saint Lucia | Eastern Australia Time | -14:00 |
| Markham Saint Julian's | Central European Time | -06:00 |
| Markham Saint-Just-Saint-Rambert | Central European Time | -06:00 |
| Markham Saint-Leonard | Eastern Time | 00:00 |
| Markham Saint Leonards | Eastern Australia Time | -14:00 |
| Markham Saint Leonards | United Kingdom Time | -05:00 |
| Markham Saint Johns | Eastern Time | 00:00 |
| Markham Saint-Joseph-de-Beauce | Eastern Time | 00:00 |
| Markham Saint-Joseph-du-Lac | Eastern Time | 00:00 |
| Markham Saint John | Central Time | 01:00 |
| Markham Zillah | Pacific Time | 03:00 |
| Markham Zirakpur | India Standard Time | -09:30 |
| Markham Zikhron Ya'akov | Israel Time | -07:00 |
| Markham Zhongshan | China Time | -12:00 |
| Markham Watson | Eastern Australia Time | -14:00 |
| Markham Wattwil | Central European Time | -06:00 |
| Markham Watkins Glen | Eastern Time | 00:00 |
| Markham Watkinsville | Eastern Time | 00:00 |
| Markham Watertown | Eastern Time | 00:00 |
| Markham Waterloo | United Kingdom Time | -05:00 |
| Markham Wasserburg am Inn | Central European Time | -06:00 |
| Markham Waterford | Eastern Australia Time | -14:00 |
| Markham Waterford Township | Eastern Time | 00:00 |
| Markham Wayne | Eastern Time | 00:00 |
| Markham Wavre | Central European Time | -06:00 |
| Markham Waverley | Eastern Australia Time | -14:00 |
| Markham Waupaca | Central Time | 01:00 |
| Markham Wauchope | Eastern Australia Time | -14:00 |
| Markham Waynesville | Eastern Time | 00:00 |
| Markham Wayville | Central Australia Time | -13:30 |
| Markham Wayzata | Central Time | 01:00 |
| Markham Weaverville | Pacific Time | 03:00 |
| Markham Webbers Falls | Central Time | 01:00 |
| Markham Webster | Central Time | 01:00 |
| Markham Zollikerberg | Central European Time | -06:00 |
| Markham Zofingen | Central European Time | -06:00 |