04:00 UTC is 4:00 AM on the UTC clock. The hour runs from 04:00 to 04:59 UTC — minutes 241 to 300 of the 1,440 in a day.
| City | Zone | 24-hour | 12-hour |
|---|---|---|---|
| Los Angeles | PDT | 21:00previous day | 9:00 PM |
| Denver | MDT | 22:00previous day | 10:00 PM |
| Chicago | CDT | 23:00previous day | 11:00 PM |
| New York | EDT | 00:00 | 12:00 AM |
| Toronto | EDT | 00:00 | 12:00 AM |
| Mexico City | CST | 22:00previous day | 10:00 PM |
| São Paulo | BRT | 01:00 | 1:00 AM |
| London | GMT | 04:00 | 4:00 AM |
| Lagos | WAT | 05:00 | 5:00 AM |
| Paris | CET | 05:00 | 5:00 AM |
| Berlin | CET | 05:00 | 5:00 AM |
| Rome | CET | 05:00 | 5:00 AM |
| Istanbul | TRT | 07:00 | 7:00 AM |
| Dubai | GST | 08:00 | 8:00 AM |
| Karachi | PKT | 09:00 | 9:00 AM |
| Mumbai | IST | 09:30 | 9:30 AM |
| Jakarta | WIB | 11:00 | 11:00 AM |
| Singapore | SGT | 12:00 | 12:00 PM |
| Manila | PHT | 12:00 | 12:00 PM |
| Shanghai | CST | 12:00 | 12:00 PM |
| Seoul | KST | 13:00 | 1:00 PM |
| Tokyo | JST | 13:00 | 1:00 PM |
| Sydney | AEDT | 15:00 | 3:00 PM |
| Auckland | NZDT | 17:00 | 5:00 PM |
On the1440.com each of these minutes is sold to one buyer, who gets the whole front page for sixty seconds. This is a off-peak hour: $2 a minute, or $40 for all sixty in one purchase.