| Hackettstown Osterwasser | Central European Time | -06:00 |
| Hackettstown Virton | Central European Time | -06:00 |
| Hackettstown Zwingenberg | Central European Time | -06:00 |
| Hackettstown Wirksworth | United Kingdom Time | -05:00 |
| Hackettstown Zanzibar Town | East Africa Time | -07:00 |
| Hackettstown Whitney | Central Time | 01:00 |
| Hackettstown Zwiefalten | Central European Time | -06:00 |
| Hackettstown Wirsberg | Central European Time | -06:00 |
| Hackettstown Yorktown Heights | Eastern Time | 00:00 |
| Hackettstown Wickham | United Kingdom Time | -05:00 |
| Hackettstown Zweisimmen | Central European Time | -06:00 |
| Hackettstown Woodbridge | Eastern Time | 00:00 |
| Hackettstown Wentworthville | Eastern Australia Time | -14:00 |
| Hackettstown Wickham Bishops | United Kingdom Time | -05:00 |
| Hackettstown Yodogawa Ward | Japan Time | -13:00 |
| Hackettstown Woodbridge Township | Eastern Time | 00:00 |
| Hackettstown Wennigsen | Central European Time | -06:00 |
| Hackettstown Wicklow | Ireland Time | -05:00 |
| Hackettstown Yoxford | United Kingdom Time | -05:00 |
| Hackettstown Woodcroft | Central Australia Time | -13:30 |
| Hackettstown Werlte | Central European Time | -06:00 |
| Hackettstown Widnau | Central European Time | -06:00 |
| Hackettstown Ypres | Central European Time | -06:00 |
| Hackettstown Wilbraham | Eastern Time | 00:00 |
| Hackettstown Zandhoven | Central European Time | -06:00 |
| Hackettstown Wildau | Central European Time | -06:00 |
| Hackettstown Yoshinogari | Japan Time | -13:00 |
| Hackettstown Wilder | Eastern Time | 00:00 |
| Hackettstown Youngsville | Central Time | 01:00 |
| Hackettstown Wilderswil | Central European Time | -06:00 |
| Hackettstown Yountville | Pacific Time | 03:00 |
| Hackettstown Wiesbaden | Central European Time | -06:00 |
| Hackettstown Wieselburg | Central European Time | -06:00 |
| Hackettstown Zillah | Pacific Time | 03:00 |
| Hackettstown Zikhron Ya'akov | Israel Time | -07:00 |
| Hackettstown Zirakpur | India Standard Time | -09:30 |
| Hackettstown Zollikerberg | Central European Time | -06:00 |
| Hackettstown Zofingen | Central European Time | -06:00 |