| Merthyr Tydfil Time | GMT | |
|---|---|---|
| 04:00 AM Monday Merthyr Tydfil Time (BST) | ↔ | 03:00 AM Monday GMT |
| 05:00 AM Monday Merthyr Tydfil Time (BST) | ↔ | 04:00 AM Monday GMT |
| 06:00 AM Monday Merthyr Tydfil Time (BST) | ↔ | 05:00 AM Monday GMT |
| 07:00 AM Monday Merthyr Tydfil Time (BST) | ↔ | 06:00 AM Monday GMT |
| 08:00 AM Monday Merthyr Tydfil Time (BST) | ↔ | 07:00 AM Monday GMT |