UTC to CAST Converter
CAST is 8 hours ahead of UTC.
UTC
Thursday, October 1, 2026
Coordinated Universal Time · UTC+0
CAST
Friday, October 2, 2026
Casey Time · UTC+8
Convert UTC to CAST
UTC 17:50 = CAST 01:50
UTC to CAST time chart, hour by hour
| UTC | CAST |
|---|
| 00:00 | 08:00 |
| 01:00 | 09:00 |
| 02:00 | 10:00 |
| 03:00 | 11:00 |
| 04:00 | 12:00 |
| 05:00 | 13:00 |
| 06:00 | 14:00 |
| 07:00 | 15:00 |
| 08:00 | 16:00 |
| 09:00 | 17:00 |
| 10:00 | 18:00 |
| 11:00 | 19:00 |
| 12:00 | 20:00 |
| 13:00 | 21:00 |
| 14:00 | 22:00 |
| 15:00 | 23:00 |
| 16:00 | 00:00 +1 day |
| 17:00 | 01:00 +1 day |
| 18:00 | 02:00 +1 day |
| 19:00 | 03:00 +1 day |
| 20:00 | 04:00 +1 day |
| 21:00 | 05:00 +1 day |
| 22:00 | 06:00 +1 day |
| 23:00 | 07:00 +1 day |
Highlighted rows fall within 09:00–18:00 in both places: 1 shared working hour.
How many hours is UTC behind CAST?
As abbreviations, CAST is always 8 hours ahead of UTC: UTC is UTC+0 and CAST is UTC+8. To convert, add 8 hours.
Does the UTC to CAST time difference change?
No. Cast is 8 hours ahead of utc all year, because neither place changes its clocks.
Calling hours for UTC and CAST
- When CAST is 8 hours ahead of UTC: no shared 09:00 to 17:00 hours; try 09:00 in UTC (17:00 in CAST).
Frequently asked questions about UTC and CAST time
How many hours ahead is CAST of UTC?
CAST (UTC+8) is 8 hours ahead of UTC (UTC+0).
Does the time difference between UTC and CAST change during the year?
No, it stays 8 hours ahead all year because neither place changes its clocks.