Time difference between Madrid and Buenos Aires
Madrid CEST · UTC+2 
Buenos Aires GMT-3 · UTC-3 Best time to call
Hours shown in Madrid time. The working-day overlap runs 2:00 PM – 5:00 PM in Madrid, which is 9:00 AM – 12:00 PM in Buenos Aires — schedule calls in that window.
Hour-by-hour conversion
| Madrid (CEST) | Buenos Aires (GMT-3) | Call quality |
|---|---|---|
| 12:00 AM | 7:00 PM−1 day | Off hours |
| 1:00 AM | 8:00 PM−1 day | Off hours |
| 2:00 AM | 9:00 PM−1 day | Off hours |
| 3:00 AM | 10:00 PM−1 day | Off hours |
| 4:00 AM | 11:00 PM−1 day | Off hours |
| 5:00 AM | 12:00 AM | Off hours |
| 6:00 AM | 1:00 AM | Off hours |
| 7:00 AM | 2:00 AM | Off hours |
| 8:00 AM | 3:00 AM | Off hours |
| 9:00 AM | 4:00 AM | Off hours |
| 10:00 AM | 5:00 AM | Off hours |
| 11:00 AM | 6:00 AM | Off hours |
| 12:00 PM | 7:00 AM | OK |
| 1:00 PM | 8:00 AM | OK |
| 2:00 PM | 9:00 AM | Best |
| 3:00 PM | 10:00 AM | Best |
| 4:00 PM | 11:00 AM | Best |
| 5:00 PM | 12:00 PM | OK |
| 6:00 PM | 1:00 PM | OK |
| 7:00 PM | 2:00 PM | OK |
| 8:00 PM | 3:00 PM | OK |
| 9:00 PM | 4:00 PM | OK |
| 10:00 PM | 5:00 PM | Off hours |
| 11:00 PM | 6:00 PM | Off hours |
Daylight saving time note
Madrid and Buenos Aires do not change their clocks on the same date. Between October 25, 2026 and March 28, 2027 the difference is 4 hours ahead of Buenos Aires — because Madrid changes its clocks for daylight saving time while Buenos Aires keeps the same time all year.
For the rest of the year the difference holds steady at 5 hours. Every time on this page is computed from the IANA database at the moment you load it, so the tables above already account for whichever side has switched.
Why the time difference exists
The clock in Madrid is anchored to UTC+1 standard time; Buenos Aires works from UTC-3 standard time. Only Madrid shifts for daylight saving; Buenos Aires stays put, which nudges the difference by an hour twice a year. Buenos Aires sits roughly 10,000 km to the southwest of Madrid.
Expect roughly a 4 hours backward adjustment travelling from Madrid to Buenos Aires. The direct distance works out to roughly 12½ hours in the air. Line up a shared window before you call and the rest is easy.
