Convert CET to AST
Convert a time in CET to AST, with daylight-saving changes applied for the date you choose.
CET to AST
Time in CET, Europe
Time in AST, North America
- CET now
- —
- AST now
- —
Time zone details
CET, Europe
- IANA zone
- Etc/GMT-1
- Standard offset
- UTC+01:00
- Daylight saving
- Not observed
AST, North America
- IANA zone
- Etc/GMT+4
- Standard offset
- UTC-04:00
- Daylight saving
- Not observed
Sunrise and sunset are calculated for the city centre and are accurate to about a minute. Local elevation and atmospheric conditions shift the observed horizon.
Need the reverse direction? Convert AST to CET.
Related time zones conversions
Frequently asked questions
What is the time difference between CET and AST?+
CET is UTC+01:00 and AST is UTC-04:00 in standard time. The gap between them changes during the year if either place observes daylight saving, so enter a date to see the difference on that day.
Does CET observe daylight saving time?+
No. CET stays on UTC+01:00 all year.
Does AST observe daylight saving time?+
No. AST stays on UTC-04:00 all year.
Why does one local time sometimes have two answers?+
When clocks go back, the hour before the change repeats, so that local reading happens twice and both instants are valid. When clocks go forward, the skipped hour never occurs, so that reading has no matching instant at all. The converter reports both cases rather than guessing.