| Boyertown Kodagu | India Standard Time | -09:30 |
| Boyertown Kaup | India Standard Time | -09:30 |
| Boyertown Kaveripakkam | India Standard Time | -09:30 |
| Boyertown Kayathar | India Standard Time | -09:30 |
| Boyertown Kayamkulam | India Standard Time | -09:30 |
| Boyertown Nakahara Ward | Japan Time | -13:00 |
| Boyertown Kawartha Lakes | Eastern Time | 00:00 |
| Boyertown Kawarau Falls | New Zealand Time | -17:00 |
| Boyertown Kittery | Eastern Time | 00:00 |
| Boyertown Kitty Hawk | Eastern Time | 00:00 |
| Boyertown Kitscoty | Mountain Time | 02:00 |
| Boyertown Kiyose | Japan Time | -13:00 |
| Boyertown Kita Ward | Japan Time | -13:00 |
| Boyertown Jeleeb Al-Shuyoukh | Arabian Time | -07:00 |
| Boyertown Jenjarom | Malaysia Time | -12:00 |
| Boyertown Jensen Beach | Eastern Time | 00:00 |
| Boyertown Jenkintown | Eastern Time | 00:00 |
| Boyertown Jelutong | Malaysia Time | -12:00 |
| Boyertown Jefferson | Eastern Time | 00:00 |
| Boyertown Jejuri | India Standard Time | -09:30 |
| Boyertown Jasper | Central Time | 01:00 |
| Boyertown Jasin | Malaysia Time | -12:00 |
| Boyertown Jayamkondan | India Standard Time | -09:30 |
| Boyertown Kathikas | Eastern European Time | -07:00 |
| Boyertown Kathu | Indochina Time | -11:00 |
| Boyertown Katlenburg-Lindau | Central European Time | -06:00 |
| Boyertown Kattankulathur | India Standard Time | -09:30 |
| Boyertown Katy | Central Time | 01:00 |
| Boyertown Kaub | Central European Time | -06:00 |
| Boyertown Katwijk aan Zee | Central European Time | -06:00 |
| Boyertown Katapady | India Standard Time | -09:30 |
| Boyertown Jesus Maria | Peru Time | 01:00 |
| Boyertown Kasuya | Japan Time | -13:00 |
| Boyertown Jerez | Central European Time | -06:00 |
| Boyertown Jerome | Mountain Time | 03:00 |
| Boyertown Jericho | Eastern Time | 00:00 |
| Boyertown Jessup | Eastern Time | 00:00 |
| Boyertown Jersey Shore | Eastern Time | 00:00 |