! Currently BST (British Summer Time) is observed in the United Kingdom and IST (Irish Summer Time) is observed in Ireland in place of GMT.
| GMT - Greenwich Mean Time (10 hours ahead of TAHT) | 1:54 AM Wednesday, September 27 Offset: UTC/GMT |
| TAHT - Tahiti Time (10 hours behind GMT / UTC) | 3:54 PM Tuesday, September 26 Offset: UTC-10 |